wpa_supplicant/config_file.c

   1 /*
   2  * WPA Supplicant / Configuration backend: text file
   3  * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  *
   8  * This file implements a configuration backend for text files. All the
   9  * configuration information is stored in a text file that uses a format
  10  * described in the sample configuration file, wpa_supplicant.conf.
  11  */
  12
  13 #include "includes.h"
  14
  15 #include "common.h"
  16 #include "config.h"
  17 #include "base64.h"
  18 #include "uuid.h"
  19 #include "p2p/p2p.h"
  20
  21
  22 /**
  23  * wpa_config_get_line - Read the next configuration file line
  24  * @s: Buffer for the line
  25  * @size: The buffer length
  26  * @stream: File stream to read from
  27  * @line: Pointer to a variable storing the file line number
  28  * @_pos: Buffer for the pointer to the beginning of data on the text line or
  29  * %NULL if not needed (returned value used instead)
  30  * Returns: Pointer to the beginning of data on the text line or %NULL if no
  31  * more text lines are available.
  32  *
  33  * This function reads the next non-empty line from the configuration file and
  34  * removes comments. The returned string is guaranteed to be null-terminated.
  35  */
  36 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
  37                                   char **_pos)
  38 {
  39         char *pos, *end, *sstart;
  40
  41         while (fgets(s, size, stream)) {
  42                 (*line)++;
  43                 s[size - 1] = '\0';
  44                 pos = s;
  45
  46                 /* Skip white space from the beginning of line. */
  47                 while (*pos == ' ' || *pos == '\t' || *pos == '\r')
  48                         pos++;
  49
  50                 /* Skip comment lines and empty lines */
  51                 if (*pos == '#' || *pos == '\n' || *pos == '\0')
  52                         continue;
  53
  54                 /*
  55                  * Remove # comments unless they are within a double quoted
  56                  * string.
  57                  */
  58                 sstart = os_strchr(pos, '"');
  59                 if (sstart)
  60                         sstart = os_strrchr(sstart + 1, '"');
  61                 if (!sstart)
  62                         sstart = pos;
  63                 end = os_strchr(sstart, '#');
  64                 if (end)
  65                         *end-- = '\0';
  66                 else
  67                         end = pos + os_strlen(pos) - 1;
  68
  69                 /* Remove trailing white space. */
  70                 while (end > pos &&
  71                        (*end == '\n' || *end == ' ' || *end == '\t' ||
  72                         *end == '\r'))
  73                         *end-- = '\0';
  74
  75                 if (*pos == '\0')
  76                         continue;
  77
  78                 if (_pos)
  79                         *_pos = pos;
  80                 return pos;
  81         }
  82
  83         if (_pos)
  84                 *_pos = NULL;
  85         return NULL;
  86 }
  87
  88
  89 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
  90 {
  91         int errors = 0;
  92
  93         if (ssid->passphrase) {
  94                 if (ssid->psk_set) {
  95                         wpa_printf(MSG_ERROR, "Line %d: both PSK and "
  96                                    "passphrase configured.", line);
  97                         errors++;
  98                 }
  99                 wpa_config_update_psk(ssid);
 100         }
 101
 102         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 103             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 104             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 105                 /* Group cipher cannot be stronger than the pairwise cipher. */
 106                 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
 107                            " list since it was not allowed for pairwise "
 108                            "cipher", line);
 109                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 110         }
 111
 112         return errors;
 113 }
 114
 115
 116 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
 117 {
 118         struct wpa_ssid *ssid;
 119         int errors = 0, end = 0;
 120         char buf[256], *pos, *pos2;
 121
 122         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
 123                    *line);
 124         ssid = os_zalloc(sizeof(*ssid));
 125         if (ssid == NULL)
 126                 return NULL;
 127         ssid->id = id;
 128
 129         wpa_config_set_network_defaults(ssid);
 130
 131         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 132                 if (os_strcmp(pos, "}") == 0) {
 133                         end = 1;
 134                         break;
 135                 }
 136
 137                 pos2 = os_strchr(pos, '=');
 138                 if (pos2 == NULL) {
 139                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 140                                    "'%s'.", *line, pos);
 141                         errors++;
 142                         continue;
 143                 }
 144
 145                 *pos2++ = '\0';
 146                 if (*pos2 == '"') {
 147                         if (os_strchr(pos2 + 1, '"') == NULL) {
 148                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 149                                            "quotation '%s'.", *line, pos2);
 150                                 errors++;
 151                                 continue;
 152                         }
 153                 }
 154
 155                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 156                         errors++;
 157         }
 158
 159         if (!end) {
 160                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 161                            "terminated properly.", *line);
 162                 errors++;
 163         }
 164
 165         errors += wpa_config_validate_network(ssid, *line);
 166
 167         if (errors) {
 168                 wpa_config_free_ssid(ssid);
 169                 ssid = NULL;
 170         }
 171
 172         return ssid;
 173 }
 174
 175
 176 static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
 177 {
 178         struct wpa_cred *cred;
 179         int errors = 0, end = 0;
 180         char buf[256], *pos, *pos2;
 181
 182         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line);
 183         cred = os_zalloc(sizeof(*cred));
 184         if (cred == NULL)
 185                 return NULL;
 186         cred->id = id;
 187
 188         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 189                 if (os_strcmp(pos, "}") == 0) {
 190                         end = 1;
 191                         break;
 192                 }
 193
 194                 pos2 = os_strchr(pos, '=');
 195                 if (pos2 == NULL) {
 196                         wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
 197                                    "'%s'.", *line, pos);
 198                         errors++;
 199                         continue;
 200                 }
 201
 202                 *pos2++ = '\0';
 203                 if (*pos2 == '"') {
 204                         if (os_strchr(pos2 + 1, '"') == NULL) {
 205                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 206                                            "quotation '%s'.", *line, pos2);
 207                                 errors++;
 208                                 continue;
 209                         }
 210                 }
 211
 212                 if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
 213                         errors++;
 214         }
 215
 216         if (!end) {
 217                 wpa_printf(MSG_ERROR, "Line %d: cred block was not "
 218                            "terminated properly.", *line);
 219                 errors++;
 220         }
 221
 222         if (errors) {
 223                 wpa_config_free_cred(cred);
 224                 cred = NULL;
 225         }
 226
 227         return cred;
 228 }
 229
 230
 231 #ifndef CONFIG_NO_CONFIG_BLOBS
 232 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 233                                                      const char *name)
 234 {
 235         struct wpa_config_blob *blob;
 236         char buf[256], *pos;
 237         unsigned char *encoded = NULL, *nencoded;
 238         int end = 0;
 239         size_t encoded_len = 0, len;
 240
 241         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 242                    *line, name);
 243
 244         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 245                 if (os_strcmp(pos, "}") == 0) {
 246                         end = 1;
 247                         break;
 248                 }
 249
 250                 len = os_strlen(pos);
 251                 nencoded = os_realloc(encoded, encoded_len + len);
 252                 if (nencoded == NULL) {
 253                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 254                                    "blob", *line);
 255                         os_free(encoded);
 256                         return NULL;
 257                 }
 258                 encoded = nencoded;
 259                 os_memcpy(encoded + encoded_len, pos, len);
 260                 encoded_len += len;
 261         }
 262
 263         if (!end) {
 264                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 265                            "properly", *line);
 266                 os_free(encoded);
 267                 return NULL;
 268         }
 269
 270         blob = os_zalloc(sizeof(*blob));
 271         if (blob == NULL) {
 272                 os_free(encoded);
 273                 return NULL;
 274         }
 275         blob->name = os_strdup(name);
 276         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 277         os_free(encoded);
 278
 279         if (blob->name == NULL || blob->data == NULL) {
 280                 wpa_config_free_blob(blob);
 281                 return NULL;
 282         }
 283
 284         return blob;
 285 }
 286
 287
 288 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 289                                    int *line, char *bname)
 290 {
 291         char *name_end;
 292         struct wpa_config_blob *blob;
 293
 294         name_end = os_strchr(bname, '=');
 295         if (name_end == NULL) {
 296                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 297                            *line);
 298                 return -1;
 299         }
 300         *name_end = '\0';
 301
 302         blob = wpa_config_read_blob(f, line, bname);
 303         if (blob == NULL) {
 304                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 305                            *line, bname);
 306                 return -1;
 307         }
 308         wpa_config_set_blob(config, blob);
 309         return 0;
 310 }
 311 #endif /* CONFIG_NO_CONFIG_BLOBS */
 312
 313
 314 struct wpa_config * wpa_config_read(const char *name)
 315 {
 316         FILE *f;
 317         char buf[512], *pos;
 318         int errors = 0, line = 0;
 319         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 320         struct wpa_cred *cred, *cred_tail = NULL, *cred_head = NULL;
 321         struct wpa_config *config;
 322         int id = 0;
 323         int cred_id = 0;
 324
 325         config = wpa_config_alloc_empty(NULL, NULL);
 326         if (config == NULL) {
 327                 wpa_printf(MSG_ERROR, "Failed to allocate config file "
 328                            "structure");
 329                 return NULL;
 330         }
 331
 332         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 333         f = fopen(name, "r");
 334         if (f == NULL) {
 335                 wpa_printf(MSG_ERROR, "Failed to open config file '%s', "
 336                            "error: %s", name, strerror(errno));
 337                 os_free(config);
 338                 return NULL;
 339         }
 340
 341         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 342                 if (os_strcmp(pos, "network={") == 0) {
 343                         ssid = wpa_config_read_network(f, &line, id++);
 344                         if (ssid == NULL) {
 345                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 346                                            "parse network block.", line);
 347                                 errors++;
 348                                 continue;
 349                         }
 350                         if (head == NULL) {
 351                                 head = tail = ssid;
 352                         } else {
 353                                 tail->next = ssid;
 354                                 tail = ssid;
 355                         }
 356                         if (wpa_config_add_prio_network(config, ssid)) {
 357                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 358                                            "network block to priority list.",
 359                                            line);
 360                                 errors++;
 361                                 continue;
 362                         }
 363                 } else if (os_strcmp(pos, "cred={") == 0) {
 364                         cred = wpa_config_read_cred(f, &line, cred_id++);
 365                         if (cred == NULL) {
 366                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 367                                            "parse cred block.", line);
 368                                 errors++;
 369                                 continue;
 370                         }
 371                         if (cred_head == NULL) {
 372                                 cred_head = cred_tail = cred;
 373                         } else {
 374                                 cred_tail->next = cred;
 375                                 cred_tail = cred;
 376                         }
 377 #ifndef CONFIG_NO_CONFIG_BLOBS
 378                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 379                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 380                             < 0) {
 381                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 382                                            "process blob.", line);
 383                                 errors++;
 384                                 continue;
 385                         }
 386 #endif /* CONFIG_NO_CONFIG_BLOBS */
 387                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 388                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 389                                    "line '%s'.", line, pos);
 390                         errors++;
 391                         continue;
 392                 }
 393         }
 394
 395         fclose(f);
 396
 397         config->ssid = head;
 398         wpa_config_debug_dump_networks(config);
 399         config->cred = cred_head;
 400
 401 #ifndef WPA_IGNORE_CONFIG_ERRORS
 402         if (errors) {
 403                 wpa_config_free(config);
 404                 config = NULL;
 405                 head = NULL;
 406         }
 407 #endif /* WPA_IGNORE_CONFIG_ERRORS */
 408
 409         return config;
 410 }
 411
 412
 413 #ifndef CONFIG_NO_CONFIG_WRITE
 414
 415 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 416 {
 417         char *value = wpa_config_get(ssid, field);
 418         if (value == NULL)
 419                 return;
 420         fprintf(f, "\t%s=%s\n", field, value);
 421         os_free(value);
 422 }
 423
 424
 425 static void write_int(FILE *f, const char *field, int value, int def)
 426 {
 427         if (value == def)
 428                 return;
 429         fprintf(f, "\t%s=%d\n", field, value);
 430 }
 431
 432
 433 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 434 {
 435         char *value = wpa_config_get(ssid, "bssid");
 436         if (value == NULL)
 437                 return;
 438         fprintf(f, "\tbssid=%s\n", value);
 439         os_free(value);
 440 }
 441
 442
 443 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 444 {
 445         char *value = wpa_config_get(ssid, "psk");
 446         if (value == NULL)
 447                 return;
 448         fprintf(f, "\tpsk=%s\n", value);
 449         os_free(value);
 450 }
 451
 452
 453 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 454 {
 455         char *value;
 456
 457         if (ssid->proto == DEFAULT_PROTO)
 458                 return;
 459
 460         value = wpa_config_get(ssid, "proto");
 461         if (value == NULL)
 462                 return;
 463         if (value[0])
 464                 fprintf(f, "\tproto=%s\n", value);
 465         os_free(value);
 466 }
 467
 468
 469 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 470 {
 471         char *value;
 472
 473         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 474                 return;
 475
 476         value = wpa_config_get(ssid, "key_mgmt");
 477         if (value == NULL)
 478                 return;
 479         if (value[0])
 480                 fprintf(f, "\tkey_mgmt=%s\n", value);
 481         os_free(value);
 482 }
 483
 484
 485 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 486 {
 487         char *value;
 488
 489         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 490                 return;
 491
 492         value = wpa_config_get(ssid, "pairwise");
 493         if (value == NULL)
 494                 return;
 495         if (value[0])
 496                 fprintf(f, "\tpairwise=%s\n", value);
 497         os_free(value);
 498 }
 499
 500
 501 static void write_group(FILE *f, struct wpa_ssid *ssid)
 502 {
 503         char *value;
 504
 505         if (ssid->group_cipher == DEFAULT_GROUP)
 506                 return;
 507
 508         value = wpa_config_get(ssid, "group");
 509         if (value == NULL)
 510                 return;
 511         if (value[0])
 512                 fprintf(f, "\tgroup=%s\n", value);
 513         os_free(value);
 514 }
 515
 516
 517 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 518 {
 519         char *value;
 520
 521         if (ssid->auth_alg == 0)
 522                 return;
 523
 524         value = wpa_config_get(ssid, "auth_alg");
 525         if (value == NULL)
 526                 return;
 527         if (value[0])
 528                 fprintf(f, "\tauth_alg=%s\n", value);
 529         os_free(value);
 530 }
 531
 532
 533 #ifdef IEEE8021X_EAPOL
 534 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 535 {
 536         char *value;
 537
 538         value = wpa_config_get(ssid, "eap");
 539         if (value == NULL)
 540                 return;
 541
 542         if (value[0])
 543                 fprintf(f, "\teap=%s\n", value);
 544         os_free(value);
 545 }
 546 #endif /* IEEE8021X_EAPOL */
 547
 548
 549 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 550 {
 551         char field[20], *value;
 552         int res;
 553
 554         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 555         if (res < 0 || (size_t) res >= sizeof(field))
 556                 return;
 557         value = wpa_config_get(ssid, field);
 558         if (value) {
 559                 fprintf(f, "\t%s=%s\n", field, value);
 560                 os_free(value);
 561         }
 562 }
 563
 564
 565 #ifdef CONFIG_P2P
 566 static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
 567 {
 568         char *value = wpa_config_get(ssid, "p2p_client_list");
 569         if (value == NULL)
 570                 return;
 571         fprintf(f, "\tp2p_client_list=%s\n", value);
 572         os_free(value);
 573 }
 574 #endif /* CONFIG_P2P */
 575
 576
 577 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 578 {
 579         int i;
 580
 581 #define STR(t) write_str(f, #t, ssid)
 582 #define INT(t) write_int(f, #t, ssid->t, 0)
 583 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 584 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 585 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 586
 587         STR(ssid);
 588         INT(scan_ssid);
 589         write_bssid(f, ssid);
 590         write_psk(f, ssid);
 591         write_proto(f, ssid);
 592         write_key_mgmt(f, ssid);
 593         INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD);
 594         write_pairwise(f, ssid);
 595         write_group(f, ssid);
 596         write_auth_alg(f, ssid);
 597         STR(bgscan);
 598         STR(autoscan);
 599 #ifdef IEEE8021X_EAPOL
 600         write_eap(f, ssid);
 601         STR(identity);
 602         STR(anonymous_identity);
 603         STR(password);
 604         STR(ca_cert);
 605         STR(ca_path);
 606         STR(client_cert);
 607         STR(private_key);
 608         STR(private_key_passwd);
 609         STR(dh_file);
 610         STR(subject_match);
 611         STR(altsubject_match);
 612         STR(ca_cert2);
 613         STR(ca_path2);
 614         STR(client_cert2);
 615         STR(private_key2);
 616         STR(private_key2_passwd);
 617         STR(dh_file2);
 618         STR(subject_match2);
 619         STR(altsubject_match2);
 620         STR(phase1);
 621         STR(phase2);
 622         STR(pcsc);
 623         STR(pin);
 624         STR(engine_id);
 625         STR(key_id);
 626         STR(cert_id);
 627         STR(ca_cert_id);
 628         STR(key2_id);
 629         STR(pin2);
 630         STR(engine2_id);
 631         STR(cert2_id);
 632         STR(ca_cert2_id);
 633         INTe(engine);
 634         INTe(engine2);
 635         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 636 #endif /* IEEE8021X_EAPOL */
 637         for (i = 0; i < 4; i++)
 638                 write_wep_key(f, i, ssid);
 639         INT(wep_tx_keyidx);
 640         INT(priority);
 641 #ifdef IEEE8021X_EAPOL
 642         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 643         STR(pac_file);
 644         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 645 #endif /* IEEE8021X_EAPOL */
 646         INT(mode);
 647         INT(proactive_key_caching);
 648         INT(disabled);
 649         INT(peerkey);
 650 #ifdef CONFIG_IEEE80211W
 651         INT(ieee80211w);
 652 #endif /* CONFIG_IEEE80211W */
 653         STR(id_str);
 654 #ifdef CONFIG_P2P
 655         write_p2p_client_list(f, ssid);
 656 #endif /* CONFIG_P2P */
 657
 658 #undef STR
 659 #undef INT
 660 #undef INT_DEF
 661 }
 662
 663
 664 static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 665 {
 666         if (cred->priority)
 667                 fprintf(f, "\tpriority=%d\n", cred->priority);
 668         if (cred->pcsc)
 669                 fprintf(f, "\tpcsc=%d\n", cred->pcsc);
 670         if (cred->realm)
 671                 fprintf(f, "\trealm=\"%s\"\n", cred->realm);
 672         if (cred->username)
 673                 fprintf(f, "\tusername=\"%s\"\n", cred->username);
 674         if (cred->password)
 675                 fprintf(f, "\tpassword=\"%s\"\n", cred->password);
 676         if (cred->ca_cert)
 677                 fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
 678         if (cred->imsi)
 679                 fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
 680         if (cred->milenage)
 681                 fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
 682         if (cred->domain)
 683                 fprintf(f, "\tdomain=\"%s\"\n", cred->domain);
 684 }
 685
 686
 687 #ifndef CONFIG_NO_CONFIG_BLOBS
 688 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 689 {
 690         unsigned char *encoded;
 691
 692         encoded = base64_encode(blob->data, blob->len, NULL);
 693         if (encoded == NULL)
 694                 return -1;
 695
 696         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 697         os_free(encoded);
 698         return 0;
 699 }
 700 #endif /* CONFIG_NO_CONFIG_BLOBS */
 701
 702
 703 static void write_global_bin(FILE *f, const char *field,
 704                              const struct wpabuf *val)
 705 {
 706         size_t i;
 707         const u8 *pos;
 708
 709         if (val == NULL)
 710                 return;
 711
 712         fprintf(f, "%s=", field);
 713         pos = wpabuf_head(val);
 714         for (i = 0; i < wpabuf_len(val); i++)
 715                 fprintf(f, "%02X", *pos++);
 716         fprintf(f, "\n");
 717 }
 718
 719
 720 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 721 {
 722 #ifdef CONFIG_CTRL_IFACE
 723         if (config->ctrl_interface)
 724                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 725         if (config->ctrl_interface_group)
 726                 fprintf(f, "ctrl_interface_group=%s\n",
 727                         config->ctrl_interface_group);
 728 #endif /* CONFIG_CTRL_IFACE */
 729         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 730                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 731         if (config->ap_scan != DEFAULT_AP_SCAN)
 732                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 733         if (config->disable_scan_offload)
 734                 fprintf(f, "disable_scan_offload=%d\n",
 735                         config->disable_scan_offload);
 736         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 737                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 738         if (config->opensc_engine_path)
 739                 fprintf(f, "opensc_engine_path=%s\n",
 740                         config->opensc_engine_path);
 741         if (config->pkcs11_engine_path)
 742                 fprintf(f, "pkcs11_engine_path=%s\n",
 743                         config->pkcs11_engine_path);
 744         if (config->pkcs11_module_path)
 745                 fprintf(f, "pkcs11_module_path=%s\n",
 746                         config->pkcs11_module_path);
 747         if (config->pcsc_reader)
 748                 fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
 749         if (config->pcsc_pin)
 750                 fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
 751         if (config->driver_param)
 752                 fprintf(f, "driver_param=%s\n", config->driver_param);
 753         if (config->dot11RSNAConfigPMKLifetime)
 754                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 755                         config->dot11RSNAConfigPMKLifetime);
 756         if (config->dot11RSNAConfigPMKReauthThreshold)
 757                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 758                         config->dot11RSNAConfigPMKReauthThreshold);
 759         if (config->dot11RSNAConfigSATimeout)
 760                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 761                         config->dot11RSNAConfigSATimeout);
 762         if (config->update_config)
 763                 fprintf(f, "update_config=%d\n", config->update_config);
 764 #ifdef CONFIG_WPS
 765         if (!is_nil_uuid(config->uuid)) {
 766                 char buf[40];
 767                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 768                 fprintf(f, "uuid=%s\n", buf);
 769         }
 770         if (config->device_name)
 771                 fprintf(f, "device_name=%s\n", config->device_name);
 772         if (config->manufacturer)
 773                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 774         if (config->model_name)
 775                 fprintf(f, "model_name=%s\n", config->model_name);
 776         if (config->model_number)
 777                 fprintf(f, "model_number=%s\n", config->model_number);
 778         if (config->serial_number)
 779                 fprintf(f, "serial_number=%s\n", config->serial_number);
 780         {
 781                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 782                 buf = wps_dev_type_bin2str(config->device_type,
 783                                            _buf, sizeof(_buf));
 784                 if (os_strcmp(buf, "0-00000000-0") != 0)
 785                         fprintf(f, "device_type=%s\n", buf);
 786         }
 787         if (WPA_GET_BE32(config->os_version))
 788                 fprintf(f, "os_version=%08x\n",
 789                         WPA_GET_BE32(config->os_version));
 790         if (config->config_methods)
 791                 fprintf(f, "config_methods=%s\n", config->config_methods);
 792         if (config->wps_cred_processing)
 793                 fprintf(f, "wps_cred_processing=%d\n",
 794                         config->wps_cred_processing);
 795         if (config->wps_vendor_ext_m1) {
 796                 int i, len = wpabuf_len(config->wps_vendor_ext_m1);
 797                 const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
 798                 if (len > 0) {
 799                         fprintf(f, "wps_vendor_ext_m1=");
 800                         for (i = 0; i < len; i++)
 801                                 fprintf(f, "%02x", *p++);
 802                         fprintf(f, "\n");
 803                 }
 804         }
 805 #endif /* CONFIG_WPS */
 806 #ifdef CONFIG_P2P
 807         if (config->p2p_listen_reg_class)
 808                 fprintf(f, "p2p_listen_reg_class=%u\n",
 809                         config->p2p_listen_reg_class);
 810         if (config->p2p_listen_channel)
 811                 fprintf(f, "p2p_listen_channel=%u\n",
 812                         config->p2p_listen_channel);
 813         if (config->p2p_oper_reg_class)
 814                 fprintf(f, "p2p_oper_reg_class=%u\n",
 815                         config->p2p_oper_reg_class);
 816         if (config->p2p_oper_channel)
 817                 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
 818         if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
 819                 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
 820         if (config->p2p_ssid_postfix)
 821                 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
 822         if (config->persistent_reconnect)
 823                 fprintf(f, "persistent_reconnect=%u\n",
 824                         config->persistent_reconnect);
 825         if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
 826                 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
 827         if (config->p2p_group_idle)
 828                 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
 829         if (config->p2p_pref_chan) {
 830                 unsigned int i;
 831                 fprintf(f, "p2p_pref_chan=");
 832                 for (i = 0; i < config->num_p2p_pref_chan; i++) {
 833                         fprintf(f, "%s%u:%u", i > 0 ? "," : "",
 834                                 config->p2p_pref_chan[i].op_class,
 835                                 config->p2p_pref_chan[i].chan);
 836                 }
 837                 fprintf(f, "\n");
 838         }
 839 #endif /* CONFIG_P2P */
 840         if (config->country[0] && config->country[1]) {
 841                 fprintf(f, "country=%c%c\n",
 842                         config->country[0], config->country[1]);
 843         }
 844         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
 845                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
 846         if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
 847                 fprintf(f, "bss_expiration_age=%u\n",
 848                         config->bss_expiration_age);
 849         if (config->bss_expiration_scan_count !=
 850             DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
 851                 fprintf(f, "bss_expiration_scan_count=%u\n",
 852                         config->bss_expiration_scan_count);
 853         if (config->filter_ssids)
 854                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
 855         if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
 856                 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
 857         if (config->disassoc_low_ack)
 858                 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
 859 #ifdef CONFIG_HS20
 860         if (config->hs20)
 861                 fprintf(f, "hs20=1\n");
 862 #endif /* CONFIG_HS20 */
 863 #ifdef CONFIG_INTERWORKING
 864         if (config->interworking)
 865                 fprintf(f, "interworking=%u\n", config->interworking);
 866         if (!is_zero_ether_addr(config->hessid))
 867                 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
 868         if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
 869                 fprintf(f, "access_network_type=%d\n",
 870                         config->access_network_type);
 871 #endif /* CONFIG_INTERWORKING */
 872         if (config->pbc_in_m1)
 873                 fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
 874         if (config->wps_nfc_dev_pw_id)
 875                 fprintf(f, "wps_nfc_dev_pw_id=%d\n",
 876                         config->wps_nfc_dev_pw_id);
 877         write_global_bin(f, "wps_nfc_dh_pubkey", config->wps_nfc_dh_pubkey);
 878         write_global_bin(f, "wps_nfc_dh_privkey", config->wps_nfc_dh_privkey);
 879         write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
 880
 881         if (config->ext_password_backend)
 882                 fprintf(f, "ext_password_backend=%s\n",
 883                         config->ext_password_backend);
 884         if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
 885                 fprintf(f, "p2p_go_max_inactivity=%d\n",
 886                         config->p2p_go_max_inactivity);
 887 }
 888
 889 #endif /* CONFIG_NO_CONFIG_WRITE */
 890
 891
 892 int wpa_config_write(const char *name, struct wpa_config *config)
 893 {
 894 #ifndef CONFIG_NO_CONFIG_WRITE
 895         FILE *f;
 896         struct wpa_ssid *ssid;
 897         struct wpa_cred *cred;
 898 #ifndef CONFIG_NO_CONFIG_BLOBS
 899         struct wpa_config_blob *blob;
 900 #endif /* CONFIG_NO_CONFIG_BLOBS */
 901         int ret = 0;
 902
 903         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 904
 905         f = fopen(name, "w");
 906         if (f == NULL) {
 907                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 908                 return -1;
 909         }
 910
 911         wpa_config_write_global(f, config);
 912
 913         for (cred = config->cred; cred; cred = cred->next) {
 914                 fprintf(f, "\ncred={\n");
 915                 wpa_config_write_cred(f, cred);
 916                 fprintf(f, "}\n");
 917         }
 918
 919         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 920                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
 921                         continue; /* do not save temporary networks */
 922                 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
 923                     !ssid->passphrase)
 924                         continue; /* do not save invalid network */
 925                 fprintf(f, "\nnetwork={\n");
 926                 wpa_config_write_network(f, ssid);
 927                 fprintf(f, "}\n");
 928         }
 929
 930 #ifndef CONFIG_NO_CONFIG_BLOBS
 931         for (blob = config->blobs; blob; blob = blob->next) {
 932                 ret = wpa_config_write_blob(f, blob);
 933                 if (ret)
 934                         break;
 935         }
 936 #endif /* CONFIG_NO_CONFIG_BLOBS */
 937
 938         fclose(f);
 939
 940         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
 941                    name, ret ? "un" : "");
 942         return ret;
 943 #else /* CONFIG_NO_CONFIG_WRITE */
 944         return -1;
 945 #endif /* CONFIG_NO_CONFIG_WRITE */
 946 }