ucimap.c

   1 /*
   2  * ucimap.c - Library for the Unified Configuration Interface
   3  * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU Lesser General Public License for more details.
  13  */
  14
  15 /*
  16  * This file contains ucimap, an API for mapping UCI to C data structures
  17  */
  18
  19 #include <strings.h>
  20 #include <stdbool.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <limits.h>
  25 #include <stdio.h>
  26 #include <ctype.h>
  27 #include <errno.h>
  28 #include "ucimap.h"
  29 #include "uci_internal.h"
  30
  31 struct ucimap_alloc {
  32         void *ptr;
  33 };
  34
  35 struct ucimap_alloc_custom {
  36         void *section;
  37         struct uci_optmap *om;
  38         void *ptr;
  39 };
  40
  41 struct ucimap_fixup {
  42         struct ucimap_fixup *next;
  43         struct uci_sectionmap *sm;
  44         const char *name;
  45         enum ucimap_type type;
  46         union ucimap_data *data;
  47 };
  48
  49 #define ucimap_foreach_option(_sm, _o) \
  50         if (!(_sm)->options_size) \
  51                 (_sm)->options_size = sizeof(struct uci_optmap); \
  52         for (_o = &(_sm)->options[0]; \
  53                  ((char *)(_o)) < ((char *) &(_sm)->options[0] + \
  54                         (_sm)->options_size * (_sm)->n_options); \
  55                  _o = (struct uci_optmap *) ((char *)(_o) + \
  56                         (_sm)->options_size))
  57
  58
  59 static inline bool
  60 ucimap_is_alloc(enum ucimap_type type)
  61 {
  62         return (type & UCIMAP_SUBTYPE) == UCIMAP_STRING;
  63 }
  64
  65 static inline bool
  66 ucimap_is_fixup(enum ucimap_type type)
  67 {
  68         return (type & UCIMAP_SUBTYPE) == UCIMAP_SECTION;
  69 }
  70
  71 static inline bool
  72 ucimap_is_simple(enum ucimap_type type)
  73 {
  74         return ((type & UCIMAP_TYPE) == UCIMAP_SIMPLE);
  75 }
  76
  77 static inline bool
  78 ucimap_is_list(enum ucimap_type type)
  79 {
  80         return ((type & UCIMAP_TYPE) == UCIMAP_LIST);
  81 }
  82
  83 static inline bool
  84 ucimap_is_list_auto(enum ucimap_type type)
  85 {
  86         return ucimap_is_list(type) && !!(type & UCIMAP_LIST_AUTO);
  87 }
  88
  89 static inline bool
  90 ucimap_is_custom(enum ucimap_type type)
  91 {
  92         return ((type & UCIMAP_SUBTYPE) == UCIMAP_CUSTOM);
  93 }
  94
  95 static inline void *
  96 ucimap_section_ptr(struct ucimap_section_data *sd)
  97 {
  98         return ((char *) sd - sd->sm->smap_offset);
  99 }
 100
 101 static inline struct ucimap_section_data *
 102 ucimap_ptr_section(struct uci_sectionmap *sm, void *ptr) {
 103         ptr = (char *) ptr + sm->smap_offset;
 104         return ptr;
 105 }
 106
 107 static inline union ucimap_data *
 108 ucimap_get_data(struct ucimap_section_data *sd, struct uci_optmap *om)
 109 {
 110         void *data;
 111
 112         data = (char *) ucimap_section_ptr(sd) + om->offset;
 113         return data;
 114 }
 115
 116 int
 117 ucimap_init(struct uci_map *map)
 118 {
 119         map->fixup = NULL;
 120         map->sdata = NULL;
 121         map->fixup_tail = &map->fixup;
 122         map->sdata_tail = &map->sdata;
 123         return 0;
 124 }
 125
 126 static void
 127 ucimap_add_alloc(struct ucimap_section_data *sd, void *ptr)
 128 {
 129         struct ucimap_alloc *a = &sd->allocmap[sd->allocmap_len++];
 130         a->ptr = ptr;
 131 }
 132
 133 void
 134 ucimap_free_section(struct uci_map *map, struct ucimap_section_data *sd)
 135 {
 136         void *section;
 137         unsigned int i;
 138
 139         section = ucimap_section_ptr(sd);
 140         if (sd->ref)
 141                 *sd->ref = sd->next;
 142
 143         if (sd->sm->free)
 144                 sd->sm->free(map, section);
 145
 146         for (i = 0; i < sd->allocmap_len; i++) {
 147                 free(sd->allocmap[i].ptr);
 148         }
 149
 150         if (sd->alloc_custom) {
 151                 for (i = 0; i < sd->alloc_custom_len; i++) {
 152                         struct ucimap_alloc_custom *a = &sd->alloc_custom[i];
 153                         a->om->free(a->section, a->om, a->ptr);
 154                 }
 155                 free(sd->alloc_custom);
 156         }
 157
 158         free(sd->allocmap);
 159         free(sd);
 160 }
 161
 162 void
 163 ucimap_cleanup(struct uci_map *map)
 164 {
 165         struct ucimap_section_data *sd, *sd_next;
 166
 167         for (sd = map->sdata; sd; sd = sd_next) {
 168                 sd_next = sd->next;
 169                 ucimap_free_section(map, sd);
 170         }
 171 }
 172
 173 static void *
 174 ucimap_find_section(struct uci_map *map, struct ucimap_fixup *f)
 175 {
 176         struct ucimap_section_data *sd;
 177
 178         for (sd = map->sdata; sd; sd = sd->next) {
 179                 if (sd->sm != f->sm)
 180                         continue;
 181                 if (strcmp(f->name, sd->section_name) != 0)
 182                         continue;
 183                 return ucimap_section_ptr(sd);
 184         }
 185         for (sd = map->pending; sd; sd = sd->next) {
 186                 if (sd->sm != f->sm)
 187                         continue;
 188                 if (strcmp(f->name, sd->section_name) != 0)
 189                         continue;
 190                 return ucimap_section_ptr(sd);
 191         }
 192         return NULL;
 193 }
 194
 195 static union ucimap_data *
 196 ucimap_list_append(struct ucimap_list *list)
 197 {
 198         if (unlikely(list->size <= list->n_items)) {
 199                 /* should not happen */
 200                 DPRINTF("ERROR: overflow while filling a list (size=%d)\n", list->size);
 201                 return NULL;
 202         }
 203         return &list->item[list->n_items++];
 204 }
 205
 206
 207 static bool
 208 ucimap_handle_fixup(struct uci_map *map, struct ucimap_fixup *f)
 209 {
 210         void *ptr = ucimap_find_section(map, f);
 211         union ucimap_data *data;
 212
 213         if (!ptr)
 214                 return false;
 215
 216         switch(f->type & UCIMAP_TYPE) {
 217         case UCIMAP_SIMPLE:
 218                 f->data->ptr = ptr;
 219                 break;
 220         case UCIMAP_LIST:
 221                 data = ucimap_list_append(f->data->list);
 222                 if (!data)
 223                         return false;
 224
 225                 data->ptr = ptr;
 226                 break;
 227         }
 228         return true;
 229 }
 230
 231 void
 232 ucimap_free_item(struct ucimap_section_data *sd, void *item)
 233 {
 234         struct ucimap_alloc_custom *ac;
 235         struct ucimap_alloc *a;
 236         void *ptr = *((void **) item);
 237         unsigned int i;
 238
 239         if (!ptr)
 240                 return;
 241
 242         *((void **)item) = NULL;
 243         for (i = 0, a = sd->allocmap; i < sd->allocmap_len; i++, a++) {
 244                 if (a->ptr != ptr)
 245                         continue;
 246
 247                 if (i != sd->allocmap_len - 1)
 248                         a->ptr = sd->allocmap[sd->allocmap_len - 1].ptr;
 249
 250                 sd->allocmap_len--;
 251                 return;
 252         }
 253
 254         for (i = 0, ac = sd->alloc_custom; i < sd->alloc_custom_len; i++, ac++) {
 255                 if (ac->ptr != ptr)
 256                         continue;
 257
 258                 if (i != sd->alloc_custom_len - 1)
 259                         memcpy(ac, &sd->alloc_custom[sd->alloc_custom_len - 1],
 260                                 sizeof(struct ucimap_alloc_custom));
 261
 262                 ac->om->free(ac->section, ac->om, ac->ptr);
 263                 sd->alloc_custom_len--;
 264                 return;
 265         }
 266 }
 267
 268 int
 269 ucimap_resize_list(struct ucimap_section_data *sd, struct ucimap_list **list, int items)
 270 {
 271         struct ucimap_list *new;
 272         struct ucimap_alloc *a;
 273         unsigned int i;
 274         int offset = 0;
 275         int size = sizeof(struct ucimap_list) + items * sizeof(union ucimap_data);
 276
 277         if (!*list) {
 278                 new = calloc(1, size);
 279                 if (!new)
 280                         return -ENOMEM;
 281
 282                 ucimap_add_alloc(sd, new);
 283                 goto set;
 284         }
 285
 286         for (i = 0, a = sd->allocmap; i < sd->allocmap_len; i++, a++) {
 287                 if (a->ptr != *list)
 288                         continue;
 289
 290                 goto realloc;
 291         }
 292         return -ENOENT;
 293
 294 realloc:
 295         if (items > (*list)->size)
 296                 offset = (items - (*list)->size) * sizeof(union ucimap_data);
 297
 298         a->ptr = realloc(a->ptr, size);
 299         if (!a->ptr)
 300                 return -ENOMEM;
 301
 302         if (offset)
 303                 memset((char *) a->ptr + offset, 0, size - offset);
 304         new = a->ptr;
 305
 306 set:
 307         new->size = items;
 308         *list = new;
 309         return 0;
 310 }
 311
 312 static void
 313 ucimap_add_fixup(struct ucimap_section_data *sd, union ucimap_data *data, struct uci_optmap *om, const char *str)
 314 {
 315         struct ucimap_fixup *f, tmp;
 316         struct uci_map *map = sd->map;
 317
 318         tmp.next = NULL;
 319         tmp.sm = om->data.sm;
 320         tmp.name = str;
 321         tmp.type = om->type;
 322         tmp.data = data;
 323         if (ucimap_handle_fixup(map, &tmp))
 324                 return;
 325
 326         f = malloc(sizeof(struct ucimap_fixup));
 327         if (!f)
 328                 return;
 329
 330         memcpy(f, &tmp, sizeof(tmp));
 331         f->next = NULL;
 332         *map->fixup_tail = f;
 333         map->fixup_tail = &f->next;
 334 }
 335
 336 static void
 337 ucimap_add_custom_alloc(struct ucimap_section_data *sd, struct uci_optmap *om, void *ptr)
 338 {
 339         struct ucimap_alloc_custom *a = &sd->alloc_custom[sd->alloc_custom_len++];
 340
 341         a->section = ucimap_section_ptr(sd);
 342         a->om = om;
 343         a->ptr = ptr;
 344 }
 345
 346 static void
 347 ucimap_add_value(union ucimap_data *data, struct uci_optmap *om, struct ucimap_section_data *sd, const char *str)
 348 {
 349         union ucimap_data tdata = *data;
 350         char *eptr = NULL;
 351         long lval;
 352         char *s;
 353         int val;
 354
 355         if (ucimap_is_list(om->type) && !ucimap_is_fixup(om->type)) {
 356                 data = ucimap_list_append(data->list);
 357                 if (!data)
 358                         return;
 359         }
 360
 361         switch(om->type & UCIMAP_SUBTYPE) {
 362         case UCIMAP_STRING:
 363                 if ((om->data.s.maxlen > 0) &&
 364                         (strlen(str) > (unsigned) om->data.s.maxlen))
 365                         return;
 366
 367                 s = strdup(str);
 368                 tdata.s = s;
 369                 ucimap_add_alloc(sd, s);
 370                 break;
 371         case UCIMAP_BOOL:
 372                 if (!strcmp(str, "on"))
 373                         val = true;
 374                 else if (!strcmp(str, "1"))
 375                         val = true;
 376                 else if (!strcmp(str, "enabled"))
 377                         val = true;
 378                 else if (!strcmp(str, "off"))
 379                         val = false;
 380                 else if (!strcmp(str, "0"))
 381                         val = false;
 382                 else if (!strcmp(str, "disabled"))
 383                         val = false;
 384                 else
 385                         return;
 386
 387                 tdata.b = val;
 388                 break;
 389         case UCIMAP_INT:
 390                 lval = strtol(str, &eptr, om->data.i.base);
 391                 if (lval < INT_MIN || lval > INT_MAX)
 392                         return;
 393
 394                 if (!eptr || *eptr == '\0')
 395                         tdata.i = (int) lval;
 396                 else
 397                         return;
 398                 break;
 399         case UCIMAP_SECTION:
 400                 ucimap_add_fixup(sd, data, om, str);
 401                 return;
 402         case UCIMAP_CUSTOM:
 403                 break;
 404         }
 405         if (om->parse) {
 406                 if (om->parse(ucimap_section_ptr(sd), om, data, str) < 0)
 407                         return;
 408                 if (ucimap_is_custom(om->type) && om->free) {
 409                         if (tdata.ptr != data->ptr)
 410                                 ucimap_add_custom_alloc(sd, om, data->ptr);
 411                 }
 412         }
 413         if (ucimap_is_custom(om->type))
 414                 return;
 415         memcpy(data, &tdata, sizeof(union ucimap_data));
 416 }
 417
 418
 419 static void
 420 ucimap_convert_list(union ucimap_data *data, struct uci_optmap *om, struct ucimap_section_data *sd, const char *str)
 421 {
 422         char *s, *p;
 423
 424         s = strdup(str);
 425         if (!s)
 426                 return;
 427
 428         ucimap_add_alloc(sd, s);
 429
 430         do {
 431                 while (isspace(*s))
 432                         s++;
 433
 434                 if (!*s)
 435                         break;
 436
 437                 p = s;
 438                 while (*s && !isspace(*s))
 439                         s++;
 440
 441                 if (isspace(*s)) {
 442                         *s = 0;
 443                         s++;
 444                 }
 445
 446                 ucimap_add_value(data, om, sd, p);
 447         } while (*s);
 448 }
 449
 450 static int
 451 ucimap_parse_options(struct uci_map *map, struct uci_sectionmap *sm, struct ucimap_section_data *sd, struct uci_section *s)
 452 {
 453         struct uci_element *e, *l;
 454         struct uci_option *o;
 455         union ucimap_data *data;
 456
 457         uci_foreach_element(&s->options, e) {
 458                 struct uci_optmap *om = NULL, *tmp;
 459
 460                 ucimap_foreach_option(sm, tmp) {
 461                         if (strcmp(e->name, tmp->name) == 0) {
 462                                 om = tmp;
 463                                 break;
 464                         }
 465                 }
 466                 if (!om)
 467                         continue;
 468
 469                 data = ucimap_get_data(sd, om);
 470                 o = uci_to_option(e);
 471                 if ((o->type == UCI_TYPE_STRING) && ucimap_is_simple(om->type)) {
 472                         ucimap_add_value(data, om, sd, o->v.string);
 473                 } else if ((o->type == UCI_TYPE_LIST) && ucimap_is_list(om->type)) {
 474                         uci_foreach_element(&o->v.list, l) {
 475                                 ucimap_add_value(data, om, sd, l->name);
 476                         }
 477                 } else if ((o->type == UCI_TYPE_STRING) && ucimap_is_list_auto(om->type)) {
 478                         ucimap_convert_list(data, om, sd, o->v.string);
 479                 }
 480         }
 481
 482         return 0;
 483 }
 484
 485 static void
 486 ucimap_add_section_list(struct uci_map *map, struct ucimap_section_data *sd)
 487 {
 488         sd->ref = map->sdata_tail;
 489         *sd->ref = sd;
 490         map->sdata_tail = &sd->next;
 491 }
 492
 493 static void
 494 ucimap_add_section(struct ucimap_section_data *sd)
 495 {
 496         struct uci_map *map = sd->map;
 497
 498         sd->next = NULL;
 499         if (sd->sm->add(map, ucimap_section_ptr(sd)) < 0)
 500                 ucimap_free_section(map, sd);
 501         else
 502                 ucimap_add_section_list(map, sd);
 503 }
 504
 505 #ifdef UCI_DEBUG
 506 static const char *ucimap_type_names[] = {
 507         [UCIMAP_STRING] = "string",
 508         [UCIMAP_INT] = "integer",
 509         [UCIMAP_BOOL] = "boolean",
 510         [UCIMAP_SECTION] = "section",
 511         [UCIMAP_LIST] = "list",
 512 };
 513
 514 static const char *
 515 ucimap_get_type_name(int type)
 516 {
 517         static char buf[32];
 518         const char *name;
 519
 520         if (ucimap_is_list(type))
 521                 return ucimap_type_names[UCIMAP_LIST];
 522
 523         name = ucimap_type_names[type & UCIMAP_SUBTYPE];
 524         if (!name) {
 525                 sprintf(buf, "Unknown (%d)", type & UCIMAP_SUBTYPE);
 526                 name = buf;
 527         }
 528
 529         return name;
 530 }
 531 #endif
 532
 533 static bool
 534 ucimap_check_optmap_type(struct uci_sectionmap *sm, struct uci_optmap *om)
 535 {
 536         int type;
 537
 538         if (unlikely(sm->type_name != om->type_name) &&
 539             unlikely(strcmp(sm->type_name, om->type_name) != 0)) {
 540                 DPRINTF("Option '%s' of section type '%s' refereces unknown "
 541                         "section type '%s', should be '%s'.\n",
 542                         om->name, sm->type, om->type_name, sm->type_name);
 543                 return false;
 544         }
 545
 546         if (om->detected_type < 0)
 547                 return true;
 548
 549         if (ucimap_is_custom(om->type))
 550                 return true;
 551
 552         if (ucimap_is_list(om->type) !=
 553             ucimap_is_list(om->detected_type))
 554                 goto failed;
 555
 556         if (ucimap_is_list(om->type))
 557                 return true;
 558
 559         type = om->type & UCIMAP_SUBTYPE;
 560         switch(type) {
 561         case UCIMAP_STRING:
 562         case UCIMAP_INT:
 563         case UCIMAP_BOOL:
 564                 if (type != om->detected_type)
 565                         goto failed;
 566                 break;
 567         case UCIMAP_SECTION:
 568                 goto failed;
 569         default:
 570                 break;
 571         }
 572         return true;
 573
 574 failed:
 575         DPRINTF("Invalid type in option '%s' of section type '%s', "
 576                 "declared type is %s, detected type is %s\n",
 577                 om->name, sm->type,
 578                 ucimap_get_type_name(om->type),
 579                 ucimap_get_type_name(om->detected_type));
 580         return false;
 581 }
 582
 583 static void
 584 ucimap_count_alloc(struct uci_optmap *om, int *n_alloc, int *n_custom)
 585 {
 586         if (ucimap_is_alloc(om->type))
 587                 (*n_alloc)++;
 588         else if (ucimap_is_custom(om->type) && om->free)
 589                 (*n_custom)++;
 590 }
 591
 592 int
 593 ucimap_parse_section(struct uci_map *map, struct uci_sectionmap *sm, struct ucimap_section_data *sd, struct uci_section *s)
 594 {
 595         struct uci_optmap *om;
 596         char *section_name;
 597         void *section;
 598         int n_alloc = 2;
 599         int n_alloc_custom = 0;
 600         int err;
 601
 602         sd->map = map;
 603         sd->sm = sm;
 604
 605         ucimap_foreach_option(sm, om) {
 606                 if (!ucimap_check_optmap_type(sm, om))
 607                         continue;
 608
 609                 if (ucimap_is_list(om->type)) {
 610                         union ucimap_data *data;
 611                         struct uci_element *e;
 612                         int n_elements = 0;
 613                         int n_elements_alloc = 0;
 614                         int n_elements_custom = 0;
 615                         int size;
 616
 617                         data = ucimap_get_data(sd, om);
 618                         uci_foreach_element(&s->options, e) {
 619                                 struct uci_option *o = uci_to_option(e);
 620                                 struct uci_element *tmp;
 621
 622                                 if (strcmp(e->name, om->name) != 0)
 623                                         continue;
 624
 625                                 if (o->type == UCI_TYPE_LIST) {
 626                                         uci_foreach_element(&o->v.list, tmp) {
 627                                                 ucimap_count_alloc(om, &n_elements_alloc, &n_elements_custom);
 628                                                 n_elements++;
 629                                         }
 630                                 } else if ((o->type == UCI_TYPE_STRING) &&
 631                                            ucimap_is_list_auto(om->type)) {
 632                                         const char *data = o->v.string;
 633                                         do {
 634                                                 while (isspace(*data))
 635                                                         data++;
 636
 637                                                 if (!*data)
 638                                                         break;
 639
 640                                                 n_elements++;
 641                                                 ucimap_count_alloc(om, &n_elements_alloc, &n_elements_custom);
 642
 643                                                 while (*data && !isspace(*data))
 644                                                         data++;
 645                                         } while (*data);
 646
 647                                         /* for the duplicated data string */
 648                                         if (n_elements)
 649                                                 n_alloc++;
 650                                 }
 651                                 break;
 652                         }
 653                         /* add one more for the ucimap_list */
 654                         n_alloc += n_elements_alloc + 1;
 655                         n_alloc_custom += n_elements_custom;
 656                         size = sizeof(struct ucimap_list) +
 657                                 n_elements * sizeof(union ucimap_data);
 658
 659                         data->list = malloc(size);
 660                         if (!data->list)
 661                                 goto error_mem;
 662
 663                         memset(data->list, 0, size);
 664                         data->list->size = n_elements;
 665                 } else {
 666                         ucimap_count_alloc(om, &n_alloc, &n_alloc_custom);
 667                 }
 668         }
 669
 670         sd->allocmap = calloc(n_alloc, sizeof(struct ucimap_alloc));
 671         if (!sd->allocmap)
 672                 goto error_mem;
 673
 674         if (n_alloc_custom > 0) {
 675                 sd->alloc_custom = calloc(n_alloc_custom, sizeof(struct ucimap_alloc_custom));
 676                 if (!sd->alloc_custom)
 677                         goto error_mem;
 678         }
 679
 680         section_name = strdup(s->e.name);
 681         if (!section_name)
 682                 goto error_mem;
 683
 684         sd->section_name = section_name;
 685
 686         sd->cmap = calloc(1, BITFIELD_SIZE(sm->n_options));
 687         if (!sd->cmap)
 688                 goto error_mem;
 689
 690         ucimap_add_alloc(sd, (void *)section_name);
 691         ucimap_add_alloc(sd, (void *)sd->cmap);
 692         ucimap_foreach_option(sm, om) {
 693                 if (!ucimap_is_list(om->type))
 694                         continue;
 695
 696                 ucimap_add_alloc(sd, ucimap_get_data(sd, om)->list);
 697         }
 698
 699         section = ucimap_section_ptr(sd);
 700         err = sm->init(map, section, s);
 701         if (err)
 702                 goto error;
 703
 704         if (map->parsed) {
 705                 ucimap_add_section(sd);
 706         } else {
 707                 ucimap_add_section_list(map, sd);
 708         }
 709
 710         err = ucimap_parse_options(map, sm, sd, s);
 711         if (err)
 712                 goto error;
 713
 714         return 0;
 715
 716 error_mem:
 717         free(sd->alloc_custom);
 718         free(sd->allocmap);
 719         free(sd);
 720         return UCI_ERR_MEM;
 721
 722 error:
 723         ucimap_free_section(map, sd);
 724         return err;
 725 }
 726
 727 static int
 728 ucimap_fill_ptr(struct uci_ptr *ptr, struct uci_section *s, const char *option)
 729 {
 730         struct uci_package *p = s->package;
 731
 732         memset(ptr, 0, sizeof(struct uci_ptr));
 733
 734         ptr->package = p->e.name;
 735         ptr->p = p;
 736
 737         ptr->section = s->e.name;
 738         ptr->s = s;
 739
 740         ptr->option = option;
 741         return uci_lookup_ptr(p->ctx, ptr, NULL, false);
 742 }
 743
 744 void
 745 ucimap_set_changed(struct ucimap_section_data *sd, void *field)
 746 {
 747         void *section = ucimap_section_ptr(sd);
 748         struct uci_sectionmap *sm = sd->sm;
 749         struct uci_optmap *om;
 750         unsigned int ofs = (char *)field - (char *)section;
 751         int i = 0;
 752
 753         ucimap_foreach_option(sm, om) {
 754                 if (om->offset == ofs) {
 755                         SET_BIT(sd->cmap, i);
 756                         break;
 757                 }
 758                 i++;
 759         }
 760 }
 761
 762 static char *
 763 ucimap_data_to_string(struct ucimap_section_data *sd, struct uci_optmap *om, union ucimap_data *data)
 764 {
 765         static char buf[32];
 766         char *str = NULL;
 767
 768         switch(om->type & UCIMAP_SUBTYPE) {
 769         case UCIMAP_STRING:
 770                 str = data->s;
 771                 break;
 772         case UCIMAP_INT:
 773                 sprintf(buf, "%d", data->i);
 774                 str = buf;
 775                 break;
 776         case UCIMAP_BOOL:
 777                 sprintf(buf, "%d", !!data->b);
 778                 str = buf;
 779                 break;
 780         case UCIMAP_SECTION:
 781                 if (data->ptr)
 782                         str = (char *) ucimap_ptr_section(om->data.sm, data->ptr)->section_name;
 783                 else
 784                         str = "";
 785                 break;
 786         case UCIMAP_CUSTOM:
 787                 break;
 788         default:
 789                 return NULL;
 790         }
 791
 792         if (om->format) {
 793                 if (om->format(ucimap_section_ptr(sd), om, data, &str) < 0)
 794                         return NULL;
 795
 796                 if (!str)
 797                         str = "";
 798         }
 799         return str;
 800 }
 801
 802 int
 803 ucimap_store_section(struct uci_map *map, struct uci_package *p, struct ucimap_section_data *sd)
 804 {
 805         struct uci_sectionmap *sm = sd->sm;
 806         struct uci_section *s = NULL;
 807         struct uci_optmap *om;
 808         struct uci_element *e;
 809         struct uci_ptr ptr;
 810         int i = 0;
 811         int ret;
 812
 813         uci_foreach_element(&p->sections, e) {
 814                 if (!strcmp(e->name, sd->section_name)) {
 815                         s = uci_to_section(e);
 816                         break;
 817                 }
 818         }
 819         if (!s)
 820                 return UCI_ERR_NOTFOUND;
 821
 822         ucimap_foreach_option(sm, om) {
 823                 union ucimap_data *data;
 824
 825                 i++;
 826                 data = ucimap_get_data(sd, om);
 827                 if (!TEST_BIT(sd->cmap, i - 1))
 828                         continue;
 829
 830                 ucimap_fill_ptr(&ptr, s, om->name);
 831                 if (ucimap_is_list(om->type)) {
 832                         struct ucimap_list *list = data->list;
 833                         bool first = true;
 834                         int j;
 835
 836                         for (j = 0; j < list->n_items; j++) {
 837                                 ptr.value = ucimap_data_to_string(sd, om, &list->item[j]);
 838                                 if (!ptr.value)
 839                                         continue;
 840
 841                                 if (first) {
 842                                         ret = uci_set(s->package->ctx, &ptr);
 843                                         first = false;
 844                                 } else {
 845                                         ret = uci_add_list(s->package->ctx, &ptr);
 846                                 }
 847                                 if (ret)
 848                                         return ret;
 849                         }
 850                 } else {
 851                         ptr.value = ucimap_data_to_string(sd, om, data);
 852                         if (!ptr.value)
 853                                 continue;
 854
 855                         ret = uci_set(s->package->ctx, &ptr);
 856                         if (ret)
 857                                 return ret;
 858                 }
 859
 860                 CLR_BIT(sd->cmap, i - 1);
 861         }
 862
 863         return 0;
 864 }
 865
 866 void
 867 ucimap_parse(struct uci_map *map, struct uci_package *pkg)
 868 {
 869         struct uci_element *e;
 870         struct ucimap_section_data *sd, **sd_tail;
 871         struct ucimap_fixup *f;
 872         unsigned int i;
 873
 874         sd_tail = map->sdata_tail;
 875         map->parsed = false;
 876         map->sdata_tail = &map->pending;
 877         uci_foreach_element(&pkg->sections, e) {
 878                 struct uci_section *s = uci_to_section(e);
 879
 880                 for (i = 0; i < map->n_sections; i++) {
 881                         struct uci_sectionmap *sm = map->sections[i];
 882                         struct ucimap_section_data *sd;
 883
 884                         if (strcmp(s->type, map->sections[i]->type) != 0)
 885                                 continue;
 886
 887                         if (sm->alloc) {
 888                                 sd = sm->alloc(map, sm, s);
 889                                 memset(sd, 0, sizeof(struct ucimap_section_data));
 890                         } else {
 891                                 sd = malloc(sm->alloc_len);
 892                                 memset(sd, 0, sm->alloc_len);
 893                                 sd = ucimap_ptr_section(sm, sd);
 894                         }
 895                         if (!sd)
 896                                 continue;
 897
 898                         ucimap_parse_section(map, sm, sd, s);
 899                 }
 900         }
 901         if (!map->parsed) {
 902                 map->parsed = true;
 903                 map->sdata_tail = sd_tail;
 904         }
 905
 906         f = map->fixup;
 907         while (f) {
 908                 struct ucimap_fixup *next = f->next;
 909                 ucimap_handle_fixup(map, f);
 910                 free(f);
 911                 f = next;
 912         }
 913         map->fixup_tail = &map->fixup;
 914         map->fixup = NULL;
 915
 916         sd = map->pending;
 917         while (sd) {
 918                 struct ucimap_section_data *next = sd->next;
 919                 ucimap_add_section(sd);
 920                 sd = next;
 921         }
 922         map->pending = NULL;
 923 }