wpa_supplicant/config_file.c

   1 /*
   2  * WPA Supplicant / Configuration backend: text file
   3  * Copyright (c) 2003-2008, 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
  20
  21 /**
  22  * wpa_config_get_line - Read the next configuration file line
  23  * @s: Buffer for the line
  24  * @size: The buffer length
  25  * @stream: File stream to read from
  26  * @line: Pointer to a variable storing the file line number
  27  * @_pos: Buffer for the pointer to the beginning of data on the text line or
  28  * %NULL if not needed (returned value used instead)
  29  * Returns: Pointer to the beginning of data on the text line or %NULL if no
  30  * more text lines are available.
  31  *
  32  * This function reads the next non-empty line from the configuration file and
  33  * removes comments. The returned string is guaranteed to be null-terminated.
  34  */
  35 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
  36                                   char **_pos)
  37 {
  38         char *pos, *end, *sstart;
  39
  40         while (fgets(s, size, stream)) {
  41                 (*line)++;
  42                 s[size - 1] = '\0';
  43                 pos = s;
  44
  45                 /* Skip white space from the beginning of line. */
  46                 while (*pos == ' ' || *pos == '\t' || *pos == '\r')
  47                         pos++;
  48
  49                 /* Skip comment lines and empty lines */
  50                 if (*pos == '#' || *pos == '\n' || *pos == '\0')
  51                         continue;
  52
  53                 /*
  54                  * Remove # comments unless they are within a double quoted
  55                  * string.
  56                  */
  57                 sstart = os_strchr(pos, '"');
  58                 if (sstart)
  59                         sstart = os_strrchr(sstart + 1, '"');
  60                 if (!sstart)
  61                         sstart = pos;
  62                 end = os_strchr(sstart, '#');
  63                 if (end)
  64                         *end-- = '\0';
  65                 else
  66                         end = pos + os_strlen(pos) - 1;
  67
  68                 /* Remove trailing white space. */
  69                 while (end > pos &&
  70                        (*end == '\n' || *end == ' ' || *end == '\t' ||
  71                         *end == '\r'))
  72                         *end-- = '\0';
  73
  74                 if (*pos == '\0')
  75                         continue;
  76
  77                 if (_pos)
  78                         *_pos = pos;
  79                 return pos;
  80         }
  81
  82         if (_pos)
  83                 *_pos = NULL;
  84         return NULL;
  85 }
  86
  87
  88 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
  89 {
  90         int errors = 0;
  91
  92         if (ssid->passphrase) {
  93                 if (ssid->psk_set) {
  94                         wpa_printf(MSG_ERROR, "Line %d: both PSK and "
  95                                    "passphrase configured.", line);
  96                         errors++;
  97                 }
  98                 wpa_config_update_psk(ssid);
  99         }
 100
 101         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set) {
 102                 wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
 103                            "management, but no PSK configured.", line);
 104                 errors++;
 105         }
 106
 107         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 108             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 109             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 110                 /* Group cipher cannot be stronger than the pairwise cipher. */
 111                 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
 112                            " list since it was not allowed for pairwise "
 113                            "cipher", line);
 114                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 115         }
 116
 117         return errors;
 118 }
 119
 120
 121 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
 122 {
 123         struct wpa_ssid *ssid;
 124         int errors = 0, end = 0;
 125         char buf[256], *pos, *pos2;
 126
 127         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
 128                    *line);
 129         ssid = os_zalloc(sizeof(*ssid));
 130         if (ssid == NULL)
 131                 return NULL;
 132         ssid->id = id;
 133
 134         wpa_config_set_network_defaults(ssid);
 135
 136         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 137                 if (os_strcmp(pos, "}") == 0) {
 138                         end = 1;
 139                         break;
 140                 }
 141
 142                 pos2 = os_strchr(pos, '=');
 143                 if (pos2 == NULL) {
 144                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 145                                    "'%s'.", *line, pos);
 146                         errors++;
 147                         continue;
 148                 }
 149
 150                 *pos2++ = '\0';
 151                 if (*pos2 == '"') {
 152                         if (os_strchr(pos2 + 1, '"') == NULL) {
 153                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 154                                            "quotation '%s'.", *line, pos2);
 155                                 errors++;
 156                                 continue;
 157                         }
 158                 }
 159
 160                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 161                         errors++;
 162         }
 163
 164         if (!end) {
 165                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 166                            "terminated properly.", *line);
 167                 errors++;
 168         }
 169
 170         errors += wpa_config_validate_network(ssid, *line);
 171
 172         if (errors) {
 173                 wpa_config_free_ssid(ssid);
 174                 ssid = NULL;
 175         }
 176
 177         return ssid;
 178 }
 179
 180
 181 static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
 182 {
 183         struct wpa_cred *cred;
 184         int errors = 0, end = 0;
 185         char buf[256], *pos, *pos2;
 186
 187         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line);
 188         cred = os_zalloc(sizeof(*cred));
 189         if (cred == NULL)
 190                 return NULL;
 191         cred->id = id;
 192
 193         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 194                 if (os_strcmp(pos, "}") == 0) {
 195                         end = 1;
 196                         break;
 197                 }
 198
 199                 pos2 = os_strchr(pos, '=');
 200                 if (pos2 == NULL) {
 201                         wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
 202                                    "'%s'.", *line, pos);
 203                         errors++;
 204                         continue;
 205                 }
 206
 207                 *pos2++ = '\0';
 208                 if (*pos2 == '"') {
 209                         if (os_strchr(pos2 + 1, '"') == NULL) {
 210                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 211                                            "quotation '%s'.", *line, pos2);
 212                                 errors++;
 213                                 continue;
 214                         }
 215                 }
 216
 217                 if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
 218                         errors++;
 219         }
 220
 221         if (!end) {
 222                 wpa_printf(MSG_ERROR, "Line %d: cred block was not "
 223                            "terminated properly.", *line);
 224                 errors++;
 225         }
 226
 227         if (errors) {
 228                 wpa_config_free_cred(cred);
 229                 cred = NULL;
 230         }
 231
 232         return cred;
 233 }
 234
 235
 236 #ifndef CONFIG_NO_CONFIG_BLOBS
 237 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 238                                                      const char *name)
 239 {
 240         struct wpa_config_blob *blob;
 241         char buf[256], *pos;
 242         unsigned char *encoded = NULL, *nencoded;
 243         int end = 0;
 244         size_t encoded_len = 0, len;
 245
 246         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 247                    *line, name);
 248
 249         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 250                 if (os_strcmp(pos, "}") == 0) {
 251                         end = 1;
 252                         break;
 253                 }
 254
 255                 len = os_strlen(pos);
 256                 nencoded = os_realloc(encoded, encoded_len + len);
 257                 if (nencoded == NULL) {
 258                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 259                                    "blob", *line);
 260                         os_free(encoded);
 261                         return NULL;
 262                 }
 263                 encoded = nencoded;
 264                 os_memcpy(encoded + encoded_len, pos, len);
 265                 encoded_len += len;
 266         }
 267
 268         if (!end) {
 269                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 270                            "properly", *line);
 271                 os_free(encoded);
 272                 return NULL;
 273         }
 274
 275         blob = os_zalloc(sizeof(*blob));
 276         if (blob == NULL) {
 277                 os_free(encoded);
 278                 return NULL;
 279         }
 280         blob->name = os_strdup(name);
 281         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 282         os_free(encoded);
 283
 284         if (blob->name == NULL || blob->data == NULL) {
 285                 wpa_config_free_blob(blob);
 286                 return NULL;
 287         }
 288
 289         return blob;
 290 }
 291
 292
 293 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 294                                    int *line, char *bname)
 295 {
 296         char *name_end;
 297         struct wpa_config_blob *blob;
 298
 299         name_end = os_strchr(bname, '=');
 300         if (name_end == NULL) {
 301                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 302                            *line);
 303                 return -1;
 304         }
 305         *name_end = '\0';
 306
 307         blob = wpa_config_read_blob(f, line, bname);
 308         if (blob == NULL) {
 309                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 310                            *line, bname);
 311                 return -1;
 312         }
 313         wpa_config_set_blob(config, blob);
 314         return 0;
 315 }
 316 #endif /* CONFIG_NO_CONFIG_BLOBS */
 317
 318
 319 struct wpa_config * wpa_config_read(const char *name)
 320 {
 321         FILE *f;
 322         char buf[256], *pos;
 323         int errors = 0, line = 0;
 324         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 325         struct wpa_cred *cred, *cred_tail = NULL, *cred_head = NULL;
 326         struct wpa_config *config;
 327         int id = 0;
 328         int cred_id = 0;
 329
 330         config = wpa_config_alloc_empty(NULL, NULL);
 331         if (config == NULL)
 332                 return NULL;
 333         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 334         f = fopen(name, "r");
 335         if (f == NULL) {
 336                 os_free(config);
 337                 return NULL;
 338         }
 339
 340         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 341                 if (os_strcmp(pos, "network={") == 0) {
 342                         ssid = wpa_config_read_network(f, &line, id++);
 343                         if (ssid == NULL) {
 344                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 345                                            "parse network block.", line);
 346                                 errors++;
 347                                 continue;
 348                         }
 349                         if (head == NULL) {
 350                                 head = tail = ssid;
 351                         } else {
 352                                 tail->next = ssid;
 353                                 tail = ssid;
 354                         }
 355                         if (wpa_config_add_prio_network(config, ssid)) {
 356                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 357                                            "network block to priority list.",
 358                                            line);
 359                                 errors++;
 360                                 continue;
 361                         }
 362                 } else if (os_strcmp(pos, "cred={") == 0) {
 363                         cred = wpa_config_read_cred(f, &line, cred_id++);
 364                         if (cred == NULL) {
 365                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 366                                            "parse cred block.", line);
 367                                 errors++;
 368                                 continue;
 369                         }
 370                         if (cred_head == NULL) {
 371                                 cred_head = cred_tail = cred;
 372                         } else {
 373                                 cred_tail->next = cred;
 374                                 cred_tail = cred;
 375                         }
 376 #ifndef CONFIG_NO_CONFIG_BLOBS
 377                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 378                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 379                             < 0) {
 380                                 errors++;
 381                                 continue;
 382                         }
 383 #endif /* CONFIG_NO_CONFIG_BLOBS */
 384                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 385                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 386                                    "line '%s'.", line, pos);
 387                         errors++;
 388                         continue;
 389                 }
 390         }
 391
 392         fclose(f);
 393
 394         config->ssid = head;
 395         wpa_config_debug_dump_networks(config);
 396         config->cred = cred_head;
 397
 398 #ifndef WPA_IGNORE_CONFIG_ERRORS
 399         if (errors) {
 400                 wpa_config_free(config);
 401                 config = NULL;
 402                 head = NULL;
 403         }
 404 #endif /* WPA_IGNORE_CONFIG_ERRORS */
 405
 406         return config;
 407 }
 408
 409
 410 #ifndef CONFIG_NO_CONFIG_WRITE
 411
 412 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 413 {
 414         char *value = wpa_config_get(ssid, field);
 415         if (value == NULL)
 416                 return;
 417         fprintf(f, "\t%s=%s\n", field, value);
 418         os_free(value);
 419 }
 420
 421
 422 static void write_int(FILE *f, const char *field, int value, int def)
 423 {
 424         if (value == def)
 425                 return;
 426         fprintf(f, "\t%s=%d\n", field, value);
 427 }
 428
 429
 430 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 431 {
 432         char *value = wpa_config_get(ssid, "bssid");
 433         if (value == NULL)
 434                 return;
 435         fprintf(f, "\tbssid=%s\n", value);
 436         os_free(value);
 437 }
 438
 439
 440 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 441 {
 442         char *value = wpa_config_get(ssid, "psk");
 443         if (value == NULL)
 444                 return;
 445         fprintf(f, "\tpsk=%s\n", value);
 446         os_free(value);
 447 }
 448
 449
 450 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 451 {
 452         char *value;
 453
 454         if (ssid->proto == DEFAULT_PROTO)
 455                 return;
 456
 457         value = wpa_config_get(ssid, "proto");
 458         if (value == NULL)
 459                 return;
 460         if (value[0])
 461                 fprintf(f, "\tproto=%s\n", value);
 462         os_free(value);
 463 }
 464
 465
 466 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 467 {
 468         char *value;
 469
 470         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 471                 return;
 472
 473         value = wpa_config_get(ssid, "key_mgmt");
 474         if (value == NULL)
 475                 return;
 476         if (value[0])
 477                 fprintf(f, "\tkey_mgmt=%s\n", value);
 478         os_free(value);
 479 }
 480
 481
 482 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 483 {
 484         char *value;
 485
 486         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 487                 return;
 488
 489         value = wpa_config_get(ssid, "pairwise");
 490         if (value == NULL)
 491                 return;
 492         if (value[0])
 493                 fprintf(f, "\tpairwise=%s\n", value);
 494         os_free(value);
 495 }
 496
 497
 498 static void write_group(FILE *f, struct wpa_ssid *ssid)
 499 {
 500         char *value;
 501
 502         if (ssid->group_cipher == DEFAULT_GROUP)
 503                 return;
 504
 505         value = wpa_config_get(ssid, "group");
 506         if (value == NULL)
 507                 return;
 508         if (value[0])
 509                 fprintf(f, "\tgroup=%s\n", value);
 510         os_free(value);
 511 }
 512
 513
 514 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 515 {
 516         char *value;
 517
 518         if (ssid->auth_alg == 0)
 519                 return;
 520
 521         value = wpa_config_get(ssid, "auth_alg");
 522         if (value == NULL)
 523                 return;
 524         if (value[0])
 525                 fprintf(f, "\tauth_alg=%s\n", value);
 526         os_free(value);
 527 }
 528
 529
 530 #ifdef IEEE8021X_EAPOL
 531 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 532 {
 533         char *value;
 534
 535         value = wpa_config_get(ssid, "eap");
 536         if (value == NULL)
 537                 return;
 538
 539         if (value[0])
 540                 fprintf(f, "\teap=%s\n", value);
 541         os_free(value);
 542 }
 543 #endif /* IEEE8021X_EAPOL */
 544
 545
 546 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 547 {
 548         char field[20], *value;
 549         int res;
 550
 551         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 552         if (res < 0 || (size_t) res >= sizeof(field))
 553                 return;
 554         value = wpa_config_get(ssid, field);
 555         if (value) {
 556                 fprintf(f, "\t%s=%s\n", field, value);
 557                 os_free(value);
 558         }
 559 }
 560
 561
 562 #ifdef CONFIG_P2P
 563 static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
 564 {
 565         char *value = wpa_config_get(ssid, "p2p_client_list");
 566         if (value == NULL)
 567                 return;
 568         fprintf(f, "\tp2p_client_list=%s\n", value);
 569         os_free(value);
 570 }
 571 #endif /* CONFIG_P2P */
 572
 573
 574 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 575 {
 576         int i;
 577
 578 #define STR(t) write_str(f, #t, ssid)
 579 #define INT(t) write_int(f, #t, ssid->t, 0)
 580 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 581 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 582 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 583
 584         STR(ssid);
 585         INT(scan_ssid);
 586         write_bssid(f, ssid);
 587         write_psk(f, ssid);
 588         write_proto(f, ssid);
 589         write_key_mgmt(f, ssid);
 590         write_pairwise(f, ssid);
 591         write_group(f, ssid);
 592         write_auth_alg(f, ssid);
 593 #ifdef IEEE8021X_EAPOL
 594         write_eap(f, ssid);
 595         STR(identity);
 596         STR(anonymous_identity);
 597         STR(password);
 598         STR(ca_cert);
 599         STR(ca_path);
 600         STR(client_cert);
 601         STR(private_key);
 602         STR(private_key_passwd);
 603         STR(dh_file);
 604         STR(subject_match);
 605         STR(altsubject_match);
 606         STR(ca_cert2);
 607         STR(ca_path2);
 608         STR(client_cert2);
 609         STR(private_key2);
 610         STR(private_key2_passwd);
 611         STR(dh_file2);
 612         STR(subject_match2);
 613         STR(altsubject_match2);
 614         STR(phase1);
 615         STR(phase2);
 616         STR(pcsc);
 617         STR(pin);
 618         STR(engine_id);
 619         STR(key_id);
 620         STR(cert_id);
 621         STR(ca_cert_id);
 622         STR(key2_id);
 623         STR(pin2);
 624         STR(engine2_id);
 625         STR(cert2_id);
 626         STR(ca_cert2_id);
 627         INTe(engine);
 628         INTe(engine2);
 629         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 630 #endif /* IEEE8021X_EAPOL */
 631         for (i = 0; i < 4; i++)
 632                 write_wep_key(f, i, ssid);
 633         INT(wep_tx_keyidx);
 634         INT(priority);
 635 #ifdef IEEE8021X_EAPOL
 636         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 637         STR(pac_file);
 638         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 639 #endif /* IEEE8021X_EAPOL */
 640         INT(mode);
 641         INT(proactive_key_caching);
 642         INT(disabled);
 643         INT(peerkey);
 644 #ifdef CONFIG_IEEE80211W
 645         INT(ieee80211w);
 646 #endif /* CONFIG_IEEE80211W */
 647         STR(id_str);
 648 #ifdef CONFIG_P2P
 649         write_p2p_client_list(f, ssid);
 650 #endif /* CONFIG_P2P */
 651
 652 #undef STR
 653 #undef INT
 654 #undef INT_DEF
 655 }
 656
 657
 658 static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 659 {
 660         if (cred->priority)
 661                 fprintf(f, "\tpriority=%d\n", cred->priority);
 662         if (cred->realm)
 663                 fprintf(f, "\trealm=\"%s\"\n", cred->realm);
 664         if (cred->username)
 665                 fprintf(f, "\tusername=\"%s\"\n", cred->username);
 666         if (cred->password)
 667                 fprintf(f, "\tpassword=\"%s\"\n", cred->password);
 668         if (cred->ca_cert)
 669                 fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
 670         if (cred->imsi)
 671                 fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
 672         if (cred->milenage)
 673                 fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
 674         if (cred->domain)
 675                 fprintf(f, "\tdomain=\"%s\"\n", cred->domain);
 676 }
 677
 678
 679 #ifndef CONFIG_NO_CONFIG_BLOBS
 680 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 681 {
 682         unsigned char *encoded;
 683
 684         encoded = base64_encode(blob->data, blob->len, NULL);
 685         if (encoded == NULL)
 686                 return -1;
 687
 688         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 689         os_free(encoded);
 690         return 0;
 691 }
 692 #endif /* CONFIG_NO_CONFIG_BLOBS */
 693
 694
 695 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 696 {
 697 #ifdef CONFIG_CTRL_IFACE
 698         if (config->ctrl_interface)
 699                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 700         if (config->ctrl_interface_group)
 701                 fprintf(f, "ctrl_interface_group=%s\n",
 702                         config->ctrl_interface_group);
 703 #endif /* CONFIG_CTRL_IFACE */
 704         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 705                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 706         if (config->ap_scan != DEFAULT_AP_SCAN)
 707                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 708         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 709                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 710         if (config->opensc_engine_path)
 711                 fprintf(f, "opensc_engine_path=%s\n",
 712                         config->opensc_engine_path);
 713         if (config->pkcs11_engine_path)
 714                 fprintf(f, "pkcs11_engine_path=%s\n",
 715                         config->pkcs11_engine_path);
 716         if (config->pkcs11_module_path)
 717                 fprintf(f, "pkcs11_module_path=%s\n",
 718                         config->pkcs11_module_path);
 719         if (config->driver_param)
 720                 fprintf(f, "driver_param=%s\n", config->driver_param);
 721         if (config->dot11RSNAConfigPMKLifetime)
 722                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 723                         config->dot11RSNAConfigPMKLifetime);
 724         if (config->dot11RSNAConfigPMKReauthThreshold)
 725                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 726                         config->dot11RSNAConfigPMKReauthThreshold);
 727         if (config->dot11RSNAConfigSATimeout)
 728                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 729                         config->dot11RSNAConfigSATimeout);
 730         if (config->update_config)
 731                 fprintf(f, "update_config=%d\n", config->update_config);
 732 #ifdef CONFIG_WPS
 733         if (!is_nil_uuid(config->uuid)) {
 734                 char buf[40];
 735                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 736                 fprintf(f, "uuid=%s\n", buf);
 737         }
 738         if (config->device_name)
 739                 fprintf(f, "device_name=%s\n", config->device_name);
 740         if (config->manufacturer)
 741                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 742         if (config->model_name)
 743                 fprintf(f, "model_name=%s\n", config->model_name);
 744         if (config->model_number)
 745                 fprintf(f, "model_number=%s\n", config->model_number);
 746         if (config->serial_number)
 747                 fprintf(f, "serial_number=%s\n", config->serial_number);
 748         {
 749                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 750                 buf = wps_dev_type_bin2str(config->device_type,
 751                                            _buf, sizeof(_buf));
 752                 if (os_strcmp(buf, "0-00000000-0") != 0)
 753                         fprintf(f, "device_type=%s\n", buf);
 754         }
 755         if (WPA_GET_BE32(config->os_version))
 756                 fprintf(f, "os_version=%08x\n",
 757                         WPA_GET_BE32(config->os_version));
 758         if (config->config_methods)
 759                 fprintf(f, "config_methods=%s\n", config->config_methods);
 760         if (config->wps_cred_processing)
 761                 fprintf(f, "wps_cred_processing=%d\n",
 762                         config->wps_cred_processing);
 763 #endif /* CONFIG_WPS */
 764 #ifdef CONFIG_P2P
 765         if (config->p2p_listen_reg_class)
 766                 fprintf(f, "p2p_listen_reg_class=%u\n",
 767                         config->p2p_listen_reg_class);
 768         if (config->p2p_listen_channel)
 769                 fprintf(f, "p2p_listen_channel=%u\n",
 770                         config->p2p_listen_channel);
 771         if (config->p2p_oper_reg_class)
 772                 fprintf(f, "p2p_oper_reg_class=%u\n",
 773                         config->p2p_oper_reg_class);
 774         if (config->p2p_oper_channel)
 775                 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
 776         if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
 777                 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
 778         if (config->p2p_ssid_postfix)
 779                 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
 780         if (config->persistent_reconnect)
 781                 fprintf(f, "persistent_reconnect=%u\n",
 782                         config->persistent_reconnect);
 783         if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
 784                 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
 785         if (config->p2p_group_idle)
 786                 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
 787 #endif /* CONFIG_P2P */
 788         if (config->country[0] && config->country[1]) {
 789                 fprintf(f, "country=%c%c\n",
 790                         config->country[0], config->country[1]);
 791         }
 792         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
 793                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
 794         if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
 795                 fprintf(f, "bss_expiration_age=%u\n",
 796                         config->bss_expiration_age);
 797         if (config->bss_expiration_scan_count !=
 798             DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
 799                 fprintf(f, "bss_expiration_scan_count=%u\n",
 800                         config->bss_expiration_scan_count);
 801         if (config->filter_ssids)
 802                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
 803         if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
 804                 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
 805         if (config->disassoc_low_ack)
 806                 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
 807 #ifdef CONFIG_INTERWORKING
 808         if (config->interworking)
 809                 fprintf(f, "interworking=%u\n", config->interworking);
 810         if (!is_zero_ether_addr(config->hessid))
 811                 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
 812         if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
 813                 fprintf(f, "access_network_type=%d\n",
 814                         config->access_network_type);
 815 #endif /* CONFIG_INTERWORKING */
 816 }
 817
 818 #endif /* CONFIG_NO_CONFIG_WRITE */
 819
 820
 821 int wpa_config_write(const char *name, struct wpa_config *config)
 822 {
 823 #ifndef CONFIG_NO_CONFIG_WRITE
 824         FILE *f;
 825         struct wpa_ssid *ssid;
 826         struct wpa_cred *cred;
 827 #ifndef CONFIG_NO_CONFIG_BLOBS
 828         struct wpa_config_blob *blob;
 829 #endif /* CONFIG_NO_CONFIG_BLOBS */
 830         int ret = 0;
 831
 832         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 833
 834         f = fopen(name, "w");
 835         if (f == NULL) {
 836                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 837                 return -1;
 838         }
 839
 840         wpa_config_write_global(f, config);
 841
 842         for (cred = config->cred; cred; cred = cred->next) {
 843                 fprintf(f, "\ncred={\n");
 844                 wpa_config_write_cred(f, cred);
 845                 fprintf(f, "}\n");
 846         }
 847
 848         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 849                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
 850                         continue; /* do not save temporary networks */
 851                 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
 852                     !ssid->passphrase)
 853                         continue; /* do not save invalid network */
 854                 fprintf(f, "\nnetwork={\n");
 855                 wpa_config_write_network(f, ssid);
 856                 fprintf(f, "}\n");
 857         }
 858
 859 #ifndef CONFIG_NO_CONFIG_BLOBS
 860         for (blob = config->blobs; blob; blob = blob->next) {
 861                 ret = wpa_config_write_blob(f, blob);
 862                 if (ret)
 863                         break;
 864         }
 865 #endif /* CONFIG_NO_CONFIG_BLOBS */
 866
 867         fclose(f);
 868
 869         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
 870                    name, ret ? "un" : "");
 871         return ret;
 872 #else /* CONFIG_NO_CONFIG_WRITE */
 873         return -1;
 874 #endif /* CONFIG_NO_CONFIG_WRITE */
 875 }