uci.c

   1 /*
   2  * luci-rpcd - LuCI UBUS RPC server
   3  *
   4  *   Copyright (C) 2013 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 "uci.h"
  20
  21 static struct blob_buf buf;
  22 static struct uci_context *cursor;
  23
  24 enum {
  25         RPC_G_CONFIG,
  26         RPC_G_SECTION,
  27         RPC_G_OPTION,
  28         RPC_G_TYPE,
  29         RPC_G_MATCH,
  30         __RPC_G_MAX,
  31 };
  32
  33 static const struct blobmsg_policy rpc_uci_get_policy[__RPC_G_MAX] = {
  34         [RPC_G_CONFIG]  = { .name = "config",  .type = BLOBMSG_TYPE_STRING },
  35         [RPC_G_SECTION] = { .name = "section", .type = BLOBMSG_TYPE_STRING },
  36         [RPC_G_OPTION]  = { .name = "option",  .type = BLOBMSG_TYPE_STRING },
  37         [RPC_G_TYPE]    = { .name = "type",    .type = BLOBMSG_TYPE_STRING },
  38         [RPC_G_MATCH]   = { .name = "match",   .type = BLOBMSG_TYPE_TABLE  },
  39 };
  40
  41 enum {
  42         RPC_A_CONFIG,
  43         RPC_A_TYPE,
  44         RPC_A_NAME,
  45         RPC_A_VALUES,
  46         __RPC_A_MAX,
  47 };
  48
  49 static const struct blobmsg_policy rpc_uci_add_policy[__RPC_A_MAX] = {
  50         [RPC_A_CONFIG]  = { .name = "config",  .type = BLOBMSG_TYPE_STRING },
  51         [RPC_A_TYPE]    = { .name = "type",    .type = BLOBMSG_TYPE_STRING },
  52         [RPC_A_NAME]    = { .name = "name",    .type = BLOBMSG_TYPE_STRING },
  53         [RPC_A_VALUES]  = { .name = "values",  .type = BLOBMSG_TYPE_TABLE  },
  54 };
  55
  56 enum {
  57         RPC_S_CONFIG,
  58         RPC_S_SECTION,
  59         RPC_S_TYPE,
  60         RPC_S_MATCH,
  61         RPC_S_VALUES,
  62         __RPC_S_MAX,
  63 };
  64
  65 static const struct blobmsg_policy rpc_uci_set_policy[__RPC_S_MAX] = {
  66         [RPC_S_CONFIG]  = { .name = "config",   .type = BLOBMSG_TYPE_STRING },
  67         [RPC_S_SECTION] = { .name = "section",  .type = BLOBMSG_TYPE_STRING },
  68         [RPC_S_TYPE]    = { .name = "type",     .type = BLOBMSG_TYPE_STRING },
  69         [RPC_S_MATCH]   = { .name = "match",    .type = BLOBMSG_TYPE_TABLE  },
  70         [RPC_S_VALUES]  = { .name = "values",   .type = BLOBMSG_TYPE_TABLE  },
  71 };
  72
  73 enum {
  74         RPC_R_CONFIG,
  75         RPC_R_SECTION,
  76         RPC_R_OPTION,
  77         RPC_R_NAME,
  78         __RPC_R_MAX,
  79 };
  80
  81 static const struct blobmsg_policy rpc_uci_rename_policy[__RPC_R_MAX] = {
  82         [RPC_R_CONFIG]  = { .name = "config",   .type = BLOBMSG_TYPE_STRING },
  83         [RPC_R_SECTION] = { .name = "section",  .type = BLOBMSG_TYPE_STRING },
  84         [RPC_R_OPTION]  = { .name = "option",   .type = BLOBMSG_TYPE_STRING },
  85         [RPC_R_NAME]    = { .name = "name",     .type = BLOBMSG_TYPE_STRING },
  86 };
  87
  88 enum {
  89         RPC_O_CONFIG,
  90         RPC_O_SECTIONS,
  91         __RPC_O_MAX,
  92 };
  93
  94 static const struct blobmsg_policy rpc_uci_order_policy[__RPC_O_MAX] = {
  95         [RPC_O_CONFIG]   = { .name = "config",   .type = BLOBMSG_TYPE_STRING },
  96         [RPC_O_SECTIONS] = { .name = "sections", .type = BLOBMSG_TYPE_ARRAY  },
  97 };
  98
  99 enum {
 100         RPC_C_CONFIG,
 101         __RPC_C_MAX,
 102 };
 103
 104 static const struct blobmsg_policy rpc_uci_config_policy[__RPC_C_MAX] = {
 105         [RPC_C_CONFIG]   = { .name = "config",  .type = BLOBMSG_TYPE_STRING },
 106 };
 107
 108 /*
 109  * Turn uci error state into ubus return code
 110  */
 111 static int
 112 rpc_uci_status(void)
 113 {
 114         switch (cursor->err)
 115         {
 116         case UCI_OK:
 117                 return UBUS_STATUS_OK;
 118
 119         case UCI_ERR_INVAL:
 120                 return UBUS_STATUS_INVALID_ARGUMENT;
 121
 122         case UCI_ERR_NOTFOUND:
 123                 return UBUS_STATUS_NOT_FOUND;
 124
 125         default:
 126                 return UBUS_STATUS_UNKNOWN_ERROR;
 127         }
 128 }
 129
 130 /*
 131  * Format applicable blob value as string and place a pointer to the string
 132  * buffer in "p". Uses a static string buffer.
 133  */
 134 static bool
 135 rpc_uci_format_blob(struct blob_attr *v, const char **p)
 136 {
 137         static char buf[21];
 138
 139         *p = NULL;
 140
 141         switch (blobmsg_type(v))
 142         {
 143         case BLOBMSG_TYPE_STRING:
 144                 if (blobmsg_data_len(v) > 1)
 145                         *p = blobmsg_data(v);
 146                 break;
 147
 148         case BLOBMSG_TYPE_INT64:
 149                 snprintf(buf, sizeof(buf), "%"PRIu64, blobmsg_get_u64(v));
 150                 *p = buf;
 151                 break;
 152
 153         case BLOBMSG_TYPE_INT32:
 154                 snprintf(buf, sizeof(buf), "%u", blobmsg_get_u32(v));
 155                 *p = buf;
 156                 break;
 157
 158         case BLOBMSG_TYPE_INT16:
 159                 snprintf(buf, sizeof(buf), "%u", blobmsg_get_u16(v));
 160                 *p = buf;
 161                 break;
 162
 163         case BLOBMSG_TYPE_INT8:
 164                 snprintf(buf, sizeof(buf), "%u", !!blobmsg_get_u8(v));
 165                 *p = buf;
 166                 break;
 167
 168         default:
 169                 break;
 170         }
 171
 172         return !!*p;
 173 }
 174
 175 /*
 176  * Lookup the given uci_ptr and enable extended lookup format if the .section
 177  * value of the uci_ptr looks like extended syntax. Uses an internal copy
 178  * of the given uci_ptr to perform the lookup as failing extended section
 179  * lookup operations in libuci will zero our the uci_ptr struct.
 180  * Copies the internal uci_ptr back to given the uci_ptr on success.
 181  */
 182 static int
 183 rpc_uci_lookup(struct uci_ptr *ptr)
 184 {
 185         int rv;
 186         struct uci_ptr lookup = *ptr;
 187
 188         if (!lookup.s && lookup.section && *lookup.section == '@')
 189                 lookup.flags |= UCI_LOOKUP_EXTENDED;
 190
 191         rv = uci_lookup_ptr(cursor, &lookup, NULL, true);
 192
 193         if (!rv)
 194                 *ptr = lookup;
 195
 196         return rv;
 197 }
 198
 199 /*
 200  * Checks whether the given uci_option object matches the given string value.
 201  *  1) If the uci_option is of type list, check whether any of the list elements
 202  *     equals to the given string
 203  *  2) If the uci_option is of type string, parse it into space separated tokens
 204  *     and check if any of the tokens equals to the given string.
 205  *  Returns true if a list element or token matched the given string.
 206  */
 207 static bool
 208 rpc_uci_match_option(struct uci_option *o, const char *cmp)
 209 {
 210         struct uci_element *e;
 211         char *s, *p;
 212
 213         if (o->type == UCI_TYPE_LIST)
 214         {
 215                 uci_foreach_element(&o->v.list, e)
 216                         if (e->name && !strcmp(e->name, cmp))
 217                                 return true;
 218
 219                 return false;
 220         }
 221
 222         if (!o->v.string)
 223                 return false;
 224
 225         s = strdup(o->v.string);
 226
 227         if (!s)
 228                 return false;
 229
 230         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 231         {
 232                 if (!strcmp(p, cmp))
 233                 {
 234                         free(s);
 235                         return true;
 236                 }
 237         }
 238
 239         free(s);
 240         return false;
 241 }
 242
 243 /*
 244  * Checks whether the given uci_section matches the type and value blob attrs.
 245  *  1) Returns false if "type" is given and the section type does not match
 246  *     the value specified in the "type" string blob attribute, else continue.
 247  *  2) Tests whether any key in the "matches" table blob attribute exists in
 248  *     the given uci_section and whether each value is contained in the
 249  *     corresponding uci option value (see rpc_uci_match_option()).
 250  *  3) A missing or empty "matches" table blob attribute is always considered
 251  *     to be a match.
 252  * Returns true if "type" matches or is NULL and "matches" matches or is NULL.
 253  */
 254 static bool
 255 rpc_uci_match_section(struct uci_section *s,
 256                       struct blob_attr *type, struct blob_attr *matches)
 257 {
 258         struct uci_element *e;
 259         struct blob_attr *cur;
 260         const char *cmp;
 261         bool match = false;
 262         bool empty = true;
 263         int rem;
 264
 265         if (type && strcmp(s->type, blobmsg_data(type)))
 266                 return false;
 267
 268         if (!matches)
 269                 return true;
 270
 271         blobmsg_for_each_attr(cur, matches, rem)
 272         {
 273                 if (!rpc_uci_format_blob(cur, &cmp))
 274                         continue;
 275
 276                 uci_foreach_element(&s->options, e)
 277                 {
 278                         if (strcmp(e->name, blobmsg_name(cur)))
 279                                 continue;
 280
 281                         if (!rpc_uci_match_option(uci_to_option(e), cmp))
 282                                 return false;
 283
 284                         match = true;
 285                 }
 286
 287                 empty = false;
 288         }
 289
 290         return (empty || match);
 291 }
 292
 293 /*
 294  * Dump the given uci_option value into the global blobmsg buffer and use
 295  * given "name" as key.
 296  *  1) If the uci_option is of type list, put a table into the blob buffer and
 297  *     add each list item as string to it.
 298  *  2) If the uci_option is of type string, put its value directly into the blob
 299  *     buffer.
 300  */
 301 static void
 302 rpc_uci_dump_option(struct uci_option *o, const char *name)
 303 {
 304         void *c;
 305         struct uci_element *e;
 306
 307         switch (o->type)
 308         {
 309         case UCI_TYPE_STRING:
 310                 blobmsg_add_string(&buf, name, o->v.string);
 311                 break;
 312
 313         case UCI_TYPE_LIST:
 314                 c = blobmsg_open_array(&buf, name);
 315
 316                 uci_foreach_element(&o->v.list, e)
 317                         blobmsg_add_string(&buf, NULL, e->name);
 318
 319                 blobmsg_close_array(&buf, c);
 320                 break;
 321
 322         default:
 323                 break;
 324         }
 325 }
 326
 327 /*
 328  * Dump the given uci_section object into the global blobmsg buffer and use
 329  * given "name" as key.
 330  * Puts a table into the blob buffer and puts each section option member value
 331  * as value into the table using the option name as key.
 332  * Adds three special keys ".anonymous", ".type" and ".name" which specify the
 333  * corresponding section properties.
 334  */
 335 static void
 336 rpc_uci_dump_section(struct uci_section *s, const char *name)
 337 {
 338         void *c;
 339         struct uci_option *o;
 340         struct uci_element *e;
 341
 342         c = blobmsg_open_table(&buf, name);
 343
 344         blobmsg_add_u8(&buf, ".anonymous", s->anonymous);
 345         blobmsg_add_string(&buf, ".type", s->type);
 346         blobmsg_add_string(&buf, ".name", s->e.name);
 347
 348         uci_foreach_element(&s->options, e)
 349         {
 350                 o = uci_to_option(e);
 351                 rpc_uci_dump_option(o, o->e.name);
 352         }
 353
 354         blobmsg_close_table(&buf, c);
 355 }
 356
 357 /*
 358  * Dump the given uci_package object into the global blobmsg buffer and use
 359  * given "name" as key.
 360  * Puts a table into the blob buffer and puts each package section member as
 361  * value into the table using the section name as key.
 362  * Only dumps sections matching the given "type" and "matches", see explaination
 363  * of rpc_uci_match_section() for details.
 364  */
 365 static void
 366 rpc_uci_dump_package(struct uci_package *p, const char *name,
 367                      struct blob_attr *type, struct blob_attr *matches)
 368 {
 369         void *c;
 370         struct uci_element *e;
 371
 372         c = blobmsg_open_table(&buf, name);
 373
 374         uci_foreach_element(&p->sections, e)
 375         {
 376                 if (!rpc_uci_match_section(uci_to_section(e), type, matches))
 377                         continue;
 378
 379                 rpc_uci_dump_section(uci_to_section(e), e->name);
 380         }
 381
 382         blobmsg_close_table(&buf, c);
 383 }
 384
 385
 386 static int
 387 rpc_uci_get(struct ubus_context *ctx, struct ubus_object *obj,
 388             struct ubus_request_data *req, const char *method,
 389             struct blob_attr *msg)
 390 {
 391         struct blob_attr *tb[__RPC_G_MAX];
 392         struct uci_package *p = NULL;
 393         struct uci_ptr ptr = { 0 };
 394
 395         blobmsg_parse(rpc_uci_get_policy, __RPC_G_MAX, tb,
 396                       blob_data(msg), blob_len(msg));
 397
 398         if (!tb[RPC_G_CONFIG])
 399                 return UBUS_STATUS_INVALID_ARGUMENT;
 400
 401         ptr.package = blobmsg_data(tb[RPC_G_CONFIG]);
 402         uci_load(cursor, ptr.package, &p);
 403
 404         if (!p)
 405                 goto out;
 406
 407         if (tb[RPC_G_SECTION])
 408         {
 409                 ptr.section = blobmsg_data(tb[RPC_G_SECTION]);
 410
 411                 if (tb[RPC_G_OPTION])
 412                         ptr.option = blobmsg_data(tb[RPC_G_OPTION]);
 413         }
 414
 415         if (rpc_uci_lookup(&ptr) || !(ptr.flags & UCI_LOOKUP_COMPLETE))
 416                 goto out;
 417
 418         blob_buf_init(&buf, 0);
 419
 420         switch (ptr.last->type)
 421         {
 422         case UCI_TYPE_PACKAGE:
 423                 rpc_uci_dump_package(ptr.p, "values", tb[RPC_G_TYPE], tb[RPC_G_MATCH]);
 424                 break;
 425
 426         case UCI_TYPE_SECTION:
 427                 rpc_uci_dump_section(ptr.s, "values");
 428                 break;
 429
 430         case UCI_TYPE_OPTION:
 431                 rpc_uci_dump_option(ptr.o, "value");
 432                 break;
 433
 434         default:
 435                 break;
 436         }
 437
 438         ubus_send_reply(ctx, req, buf.head);
 439
 440 out:
 441         if (p)
 442                 uci_unload(cursor, p);
 443
 444         return rpc_uci_status();
 445 }
 446
 447 static int
 448 rpc_uci_add(struct ubus_context *ctx, struct ubus_object *obj,
 449             struct ubus_request_data *req, const char *method,
 450             struct blob_attr *msg)
 451 {
 452         struct blob_attr *tb[__RPC_A_MAX];
 453         struct blob_attr *cur, *elem;
 454         struct uci_package *p = NULL;
 455         struct uci_section *s;
 456         struct uci_ptr ptr = { 0 };
 457         int rem, rem2;
 458
 459         blobmsg_parse(rpc_uci_add_policy, __RPC_A_MAX, tb,
 460                       blob_data(msg), blob_len(msg));
 461
 462         if (!tb[RPC_A_CONFIG] || !tb[RPC_A_TYPE])
 463                 return UBUS_STATUS_INVALID_ARGUMENT;
 464
 465         ptr.package = blobmsg_data(tb[RPC_A_CONFIG]);
 466
 467         uci_load(cursor, ptr.package, &p);
 468
 469         if (!p)
 470                 goto out;
 471
 472         /* add named section */
 473         if (tb[RPC_A_NAME])
 474         {
 475                 ptr.section = blobmsg_data(tb[RPC_A_NAME]);
 476                 ptr.value   = blobmsg_data(tb[RPC_A_TYPE]);
 477                 ptr.option  = NULL;
 478
 479                 if (rpc_uci_lookup(&ptr) || uci_set(cursor, &ptr))
 480                         goto out;
 481         }
 482
 483         /* add anon section */
 484         else
 485         {
 486                 if (uci_add_section(cursor, p, blobmsg_data(tb[RPC_A_TYPE]), &s) || !s)
 487                         goto out;
 488
 489                 ptr.section = s->e.name;
 490         }
 491
 492         if (tb[RPC_A_VALUES])
 493         {
 494                 blobmsg_for_each_attr(cur, tb[RPC_A_VALUES], rem)
 495                 {
 496                         ptr.o = NULL;
 497                         ptr.option = blobmsg_name(cur);
 498
 499                         if (rpc_uci_lookup(&ptr) || !ptr.s)
 500                                 continue;
 501
 502                         switch (blobmsg_type(cur))
 503                         {
 504                         case BLOBMSG_TYPE_ARRAY:
 505                                 blobmsg_for_each_attr(elem, cur, rem2)
 506                                         if (rpc_uci_format_blob(elem, &ptr.value))
 507                                                 uci_add_list(cursor, &ptr);
 508                                 break;
 509
 510                         default:
 511                                 if (rpc_uci_format_blob(cur, &ptr.value))
 512                                         uci_set(cursor, &ptr);
 513                                 break;
 514                         }
 515                 }
 516         }
 517
 518         uci_save(cursor, p);
 519
 520         blob_buf_init(&buf, 0);
 521         blobmsg_add_string(&buf, "section", ptr.section);
 522         ubus_send_reply(ctx, req, buf.head);
 523
 524 out:
 525         if (p)
 526                 uci_unload(cursor, p);
 527
 528         return rpc_uci_status();
 529 }
 530
 531 /*
 532  * Turn value from a blob attribute into uci set operation
 533  *  1) if the blob is of type array, delete existing option (if any) and
 534  *     emit uci add_list operations for each element
 535  *  2) if the blob is not an array but an option of type list exists,
 536  *     delete existing list and emit uci set operation for the blob value
 537  *  3) in all other cases only emit a set operation if there is no existing
 538  *     option of if the existing options value differs from the blob value
 539  */
 540 static void
 541 rpc_uci_merge_set(struct blob_attr *opt, struct uci_ptr *ptr)
 542 {
 543         struct blob_attr *cur;
 544         int rem;
 545
 546         ptr->o = NULL;
 547         ptr->option = blobmsg_name(opt);
 548
 549         if (rpc_uci_lookup(ptr) || !ptr->s)
 550                 return;
 551
 552         if (blobmsg_type(opt) == BLOBMSG_TYPE_ARRAY)
 553         {
 554                 if (ptr->o)
 555                         uci_delete(cursor, ptr);
 556
 557                 blobmsg_for_each_attr(cur, opt, rem)
 558                         if (rpc_uci_format_blob(cur, &ptr->value))
 559                                 uci_add_list(cursor, ptr);
 560         }
 561         else if (ptr->o && ptr->o->type == UCI_TYPE_LIST)
 562         {
 563                 uci_delete(cursor, ptr);
 564
 565                 if (rpc_uci_format_blob(opt, &ptr->value))
 566                         uci_set(cursor, ptr);
 567         }
 568         else if (rpc_uci_format_blob(opt, &ptr->value))
 569         {
 570                 if (!ptr->o || !ptr->o->v.string || strcmp(ptr->o->v.string, ptr->value))
 571                         uci_set(cursor, ptr);
 572         }
 573 }
 574
 575 static int
 576 rpc_uci_set(struct ubus_context *ctx, struct ubus_object *obj,
 577             struct ubus_request_data *req, const char *method,
 578             struct blob_attr *msg)
 579 {
 580         struct blob_attr *tb[__RPC_S_MAX];
 581         struct blob_attr *cur;
 582         struct uci_package *p = NULL;
 583         struct uci_element *e;
 584         struct uci_ptr ptr = { 0 };
 585         int rem;
 586
 587         blobmsg_parse(rpc_uci_set_policy, __RPC_S_MAX, tb,
 588                       blob_data(msg), blob_len(msg));
 589
 590         if (!tb[RPC_S_CONFIG] || !tb[RPC_S_VALUES] ||
 591                 (!tb[RPC_S_SECTION] && !tb[RPC_S_TYPE] && !tb[RPC_S_MATCH]))
 592                 return UBUS_STATUS_INVALID_ARGUMENT;
 593
 594         ptr.package = blobmsg_data(tb[RPC_S_CONFIG]);
 595         uci_load(cursor, ptr.package, &p);
 596
 597         if (!p)
 598                 goto out;
 599
 600         if (tb[RPC_S_SECTION])
 601         {
 602                 ptr.section = blobmsg_data(tb[RPC_S_SECTION]);
 603                 blobmsg_for_each_attr(cur, tb[RPC_S_VALUES], rem)
 604                         rpc_uci_merge_set(cur, &ptr);
 605         }
 606         else
 607         {
 608                 uci_foreach_element(&p->sections, e)
 609                 {
 610                         if (!rpc_uci_match_section(uci_to_section(e),
 611                                                    tb[RPC_S_TYPE], tb[RPC_S_MATCH]))
 612                                 continue;
 613
 614                         ptr.s = NULL;
 615                         ptr.section = e->name;
 616
 617                         blobmsg_for_each_attr(cur, tb[RPC_S_VALUES], rem)
 618                                 rpc_uci_merge_set(cur, &ptr);
 619                 }
 620         }
 621
 622         uci_save(cursor, p);
 623
 624 out:
 625         if (p)
 626                 uci_unload(cursor, p);
 627
 628         return rpc_uci_status();
 629 }
 630
 631 static int
 632 rpc_uci_rename(struct ubus_context *ctx, struct ubus_object *obj,
 633                struct ubus_request_data *req, const char *method,
 634                struct blob_attr *msg)
 635 {
 636         struct blob_attr *tb[__RPC_R_MAX];
 637         struct uci_package *p = NULL;
 638         struct uci_ptr ptr = { 0 };
 639
 640         blobmsg_parse(rpc_uci_rename_policy, __RPC_R_MAX, tb,
 641                       blob_data(msg), blob_len(msg));
 642
 643         if (!tb[RPC_R_CONFIG] || !tb[RPC_R_SECTION] || !tb[RPC_R_NAME])
 644                 return UBUS_STATUS_INVALID_ARGUMENT;
 645
 646         ptr.package = blobmsg_data(tb[RPC_R_CONFIG]);
 647         ptr.section = blobmsg_data(tb[RPC_R_SECTION]);
 648         ptr.value   = blobmsg_data(tb[RPC_R_NAME]);
 649
 650         if (tb[RPC_R_OPTION])
 651                 ptr.option = blobmsg_data(tb[RPC_R_OPTION]);
 652
 653         uci_load(cursor, ptr.package, &p);
 654
 655         if (!p)
 656                 goto out;
 657
 658         if (uci_lookup_ptr(cursor, &ptr, NULL, true))
 659                 goto out;
 660
 661         if ((ptr.option && !ptr.o) || !ptr.s)
 662         {
 663                 cursor->err = UCI_ERR_NOTFOUND;
 664                 goto out;
 665         }
 666
 667         if (uci_rename(cursor, &ptr))
 668                 goto out;
 669
 670         uci_save(cursor, p);
 671
 672 out:
 673         if (p)
 674                 uci_unload(cursor, p);
 675
 676         return rpc_uci_status();
 677 }
 678
 679 static int
 680 rpc_uci_order(struct ubus_context *ctx, struct ubus_object *obj,
 681               struct ubus_request_data *req, const char *method,
 682               struct blob_attr *msg)
 683 {
 684         struct blob_attr *tb[__RPC_O_MAX];
 685         struct blob_attr *cur;
 686         struct uci_package *p = NULL;
 687         struct uci_ptr ptr = { 0 };
 688         int rem, i = 1;
 689
 690         blobmsg_parse(rpc_uci_order_policy, __RPC_O_MAX, tb,
 691                       blob_data(msg), blob_len(msg));
 692
 693         if (!tb[RPC_O_CONFIG] || !tb[RPC_O_SECTIONS])
 694                 return UBUS_STATUS_INVALID_ARGUMENT;
 695
 696         ptr.package = blobmsg_data(tb[RPC_O_CONFIG]);
 697
 698         uci_load(cursor, ptr.package, &p);
 699
 700         if (!p)
 701                 goto out;
 702
 703         blobmsg_for_each_attr(cur, tb[RPC_O_SECTIONS], rem)
 704         {
 705                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 706                         continue;
 707
 708                 ptr.s = NULL;
 709                 ptr.section = blobmsg_data(cur);
 710
 711                 if (uci_lookup_ptr(cursor, &ptr, NULL, true) || !ptr.s)
 712                         continue;
 713
 714                 uci_reorder_section(cursor, ptr.s, i++);
 715         }
 716
 717         uci_save(cursor, p);
 718
 719 out:
 720         if (p)
 721                 uci_unload(cursor, p);
 722
 723         return rpc_uci_status();
 724 }
 725
 726 static void
 727 rpc_uci_dump_change(struct uci_delta *d)
 728 {
 729         void *c;
 730         const char *types[] = {
 731                 [UCI_CMD_REORDER]  = "order",
 732                 [UCI_CMD_REMOVE]   = "remove",
 733                 [UCI_CMD_RENAME]   = "rename",
 734                 [UCI_CMD_ADD]      = "add",
 735                 [UCI_CMD_LIST_ADD] = "list-add",
 736                 [UCI_CMD_LIST_DEL] = "list-del",
 737                 [UCI_CMD_CHANGE]   = "set",
 738         };
 739
 740         if (!d->section)
 741                 return;
 742
 743         c = blobmsg_open_array(&buf, NULL);
 744
 745         blobmsg_add_string(&buf, NULL, types[d->cmd]);
 746         blobmsg_add_string(&buf, NULL, d->section);
 747
 748         if (d->e.name)
 749                 blobmsg_add_string(&buf, NULL, d->e.name);
 750
 751         if (d->value)
 752         {
 753                 if (d->cmd == UCI_CMD_REORDER)
 754                         blobmsg_add_u32(&buf, NULL, strtoul(d->value, NULL, 10));
 755                 else
 756                         blobmsg_add_string(&buf, NULL, d->value);
 757         }
 758
 759         blobmsg_close_array(&buf, c);
 760 }
 761
 762 static int
 763 rpc_uci_changes(struct ubus_context *ctx, struct ubus_object *obj,
 764                 struct ubus_request_data *req, const char *method,
 765                 struct blob_attr *msg)
 766 {
 767         struct blob_attr *tb[__RPC_C_MAX];
 768         struct uci_package *p = NULL;
 769         struct uci_element *e;
 770         void *c;
 771
 772         blobmsg_parse(rpc_uci_config_policy, __RPC_C_MAX, tb,
 773                       blob_data(msg), blob_len(msg));
 774
 775         if (!tb[RPC_C_CONFIG])
 776                 return UBUS_STATUS_INVALID_ARGUMENT;
 777
 778         uci_load(cursor, blobmsg_data(tb[RPC_C_CONFIG]), &p);
 779
 780         if (!p)
 781                 goto out;
 782
 783         blob_buf_init(&buf, 0);
 784         c = blobmsg_open_array(&buf, "changes");
 785
 786         uci_foreach_element(&p->saved_delta, e)
 787                 rpc_uci_dump_change(uci_to_delta(e));
 788
 789         blobmsg_close_array(&buf, c);
 790
 791         ubus_send_reply(ctx, req, buf.head);
 792
 793 out:
 794         if (p)
 795                 uci_unload(cursor, p);
 796
 797         return rpc_uci_status();
 798 }
 799
 800 static int
 801 rpc_uci_revert_commit(struct blob_attr *msg, bool commit)
 802 {
 803         struct blob_attr *tb[__RPC_C_MAX];
 804         struct uci_package *p = NULL;
 805         struct uci_ptr ptr = { 0 };
 806
 807         blobmsg_parse(rpc_uci_config_policy, __RPC_C_MAX, tb,
 808                       blob_data(msg), blob_len(msg));
 809
 810         if (!tb[RPC_C_CONFIG])
 811                 return UBUS_STATUS_INVALID_ARGUMENT;
 812
 813         ptr.package = blobmsg_data(tb[RPC_C_CONFIG]);
 814         uci_load(cursor, ptr.package, &p);
 815
 816         if (!p || uci_lookup_ptr(cursor, &ptr, NULL, true) || !ptr.p)
 817                 goto out;
 818
 819         if (commit)
 820                 uci_commit(cursor, &p, false);
 821         else
 822                 uci_revert(cursor, &ptr);
 823
 824 out:
 825         if (p)
 826                 uci_unload(cursor, p);
 827
 828         return rpc_uci_status();
 829 }
 830
 831 static int
 832 rpc_uci_revert(struct ubus_context *ctx, struct ubus_object *obj,
 833                struct ubus_request_data *req, const char *method,
 834                struct blob_attr *msg)
 835 {
 836         return rpc_uci_revert_commit(msg, false);
 837 }
 838
 839 static int
 840 rpc_uci_commit(struct ubus_context *ctx, struct ubus_object *obj,
 841                struct ubus_request_data *req, const char *method,
 842                struct blob_attr *msg)
 843 {
 844         return rpc_uci_revert_commit(msg, true);
 845 }
 846
 847 static int
 848 rpc_uci_configs(struct ubus_context *ctx, struct ubus_object *obj,
 849                 struct ubus_request_data *req, const char *method,
 850                 struct blob_attr *msg)
 851 {
 852         char **configs;
 853         void *c;
 854         int i;
 855
 856         if (uci_list_configs(cursor, &configs))
 857                 goto out;
 858
 859         blob_buf_init(&buf, 0);
 860
 861         c = blobmsg_open_array(&buf, "configs");
 862
 863         for (i = 0; configs[i]; i++)
 864                 blobmsg_add_string(&buf, NULL, configs[i]);
 865
 866         blobmsg_close_array(&buf, c);
 867
 868         ubus_send_reply(ctx, req, buf.head);
 869
 870 out:
 871         return rpc_uci_status();
 872 }
 873
 874
 875 int rpc_uci_api_init(struct ubus_context *ctx)
 876 {
 877         static const struct ubus_method uci_methods[] = {
 878                 { .name = "configs", .handler = rpc_uci_configs },
 879                 UBUS_METHOD("get",     rpc_uci_get,     rpc_uci_get_policy),
 880                 UBUS_METHOD("add",     rpc_uci_add,     rpc_uci_add_policy),
 881                 UBUS_METHOD("set",     rpc_uci_set,     rpc_uci_set_policy),
 882                 UBUS_METHOD("rename",  rpc_uci_rename,  rpc_uci_rename_policy),
 883                 UBUS_METHOD("order",   rpc_uci_order,   rpc_uci_order_policy),
 884                 UBUS_METHOD("changes", rpc_uci_changes, rpc_uci_config_policy),
 885                 UBUS_METHOD("revert",  rpc_uci_revert,  rpc_uci_config_policy),
 886                 UBUS_METHOD("commit",  rpc_uci_commit,  rpc_uci_config_policy),
 887         };
 888
 889         static struct ubus_object_type uci_type =
 890                 UBUS_OBJECT_TYPE("luci-rpc-uci", uci_methods);
 891
 892         static struct ubus_object obj = {
 893                 .name = "uci",
 894                 .type = &uci_type,
 895                 .methods = uci_methods,
 896                 .n_methods = ARRAY_SIZE(uci_methods),
 897         };
 898
 899         cursor = uci_alloc_context();
 900
 901         if (!cursor)
 902                 return UBUS_STATUS_UNKNOWN_ERROR;
 903
 904         return ubus_add_object(ctx, &obj);
 905 }