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 program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements a configuration backend for text files. All the
  15  * configuration information is stored in a text file that uses a format
  16  * described in the sample configuration file, wpa_supplicant.conf.
  17  */
  18
  19 #include "includes.h"
  20
  21 #include "common.h"
  22 #include "config.h"
  23 #include "base64.h"
  24 #include "uuid.h"
  25
  26
  27 /**
  28  * wpa_config_get_line - Read the next configuration file line
  29  * @s: Buffer for the line
  30  * @size: The buffer length
  31  * @stream: File stream to read from
  32  * @line: Pointer to a variable storing the file line number
  33  * @_pos: Buffer for the pointer to the beginning of data on the text line or
  34  * %NULL if not needed (returned value used instead)
  35  * Returns: Pointer to the beginning of data on the text line or %NULL if no
  36  * more text lines are available.
  37  *
  38  * This function reads the next non-empty line from the configuration file and
  39  * removes comments. The returned string is guaranteed to be null-terminated.
  40  */
  41 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
  42                                   char **_pos)
  43 {
  44         char *pos, *end, *sstart;
  45
  46         while (fgets(s, size, stream)) {
  47                 (*line)++;
  48                 s[size - 1] = '\0';
  49                 pos = s;
  50
  51                 /* Skip white space from the beginning of line. */
  52                 while (*pos == ' ' || *pos == '\t' || *pos == '\r')
  53                         pos++;
  54
  55                 /* Skip comment lines and empty lines */
  56                 if (*pos == '#' || *pos == '\n' || *pos == '\0')
  57                         continue;
  58
  59                 /*
  60                  * Remove # comments unless they are within a double quoted
  61                  * string.
  62                  */
  63                 sstart = os_strchr(pos, '"');
  64                 if (sstart)
  65                         sstart = os_strrchr(sstart + 1, '"');
  66                 if (!sstart)
  67                         sstart = pos;
  68                 end = os_strchr(sstart, '#');
  69                 if (end)
  70                         *end-- = '\0';
  71                 else
  72                         end = pos + os_strlen(pos) - 1;
  73
  74                 /* Remove trailing white space. */
  75                 while (end > pos &&
  76                        (*end == '\n' || *end == ' ' || *end == '\t' ||
  77                         *end == '\r'))
  78                         *end-- = '\0';
  79
  80                 if (*pos == '\0')
  81                         continue;
  82
  83                 if (_pos)
  84                         *_pos = pos;
  85                 return pos;
  86         }
  87
  88         if (_pos)
  89                 *_pos = NULL;
  90         return NULL;
  91 }
  92
  93
  94 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
  95 {
  96         int errors = 0;
  97
  98         if (ssid->passphrase) {
  99                 if (ssid->psk_set) {
 100                         wpa_printf(MSG_ERROR, "Line %d: both PSK and "
 101                                    "passphrase configured.", line);
 102                         errors++;
 103                 }
 104                 wpa_config_update_psk(ssid);
 105         }
 106
 107         if ((ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK |
 108                                WPA_KEY_MGMT_PSK_SHA256)) &&
 109             !ssid->psk_set) {
 110                 wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
 111                            "management, but no PSK configured.", line);
 112                 errors++;
 113         }
 114
 115         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 116             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 117             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 118                 /* Group cipher cannot be stronger than the pairwise cipher. */
 119                 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
 120                            " list since it was not allowed for pairwise "
 121                            "cipher", line);
 122                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 123         }
 124
 125         return errors;
 126 }
 127
 128
 129 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
 130 {
 131         struct wpa_ssid *ssid;
 132         int errors = 0, end = 0;
 133         char buf[256], *pos, *pos2;
 134
 135         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
 136                    *line);
 137         ssid = os_zalloc(sizeof(*ssid));
 138         if (ssid == NULL)
 139                 return NULL;
 140         ssid->id = id;
 141
 142         wpa_config_set_network_defaults(ssid);
 143
 144         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 145                 if (os_strcmp(pos, "}") == 0) {
 146                         end = 1;
 147                         break;
 148                 }
 149
 150                 pos2 = os_strchr(pos, '=');
 151                 if (pos2 == NULL) {
 152                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 153                                    "'%s'.", *line, pos);
 154                         errors++;
 155                         continue;
 156                 }
 157
 158                 *pos2++ = '\0';
 159                 if (*pos2 == '"') {
 160                         if (os_strchr(pos2 + 1, '"') == NULL) {
 161                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 162                                            "quotation '%s'.", *line, pos2);
 163                                 errors++;
 164                                 continue;
 165                         }
 166                 }
 167
 168                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 169                         errors++;
 170         }
 171
 172         if (!end) {
 173                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 174                            "terminated properly.", *line);
 175                 errors++;
 176         }
 177
 178         errors += wpa_config_validate_network(ssid, *line);
 179
 180         if (errors) {
 181                 wpa_config_free_ssid(ssid);
 182                 ssid = NULL;
 183         }
 184
 185         return ssid;
 186 }
 187
 188
 189 #ifndef CONFIG_NO_CONFIG_BLOBS
 190 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 191                                                      const char *name)
 192 {
 193         struct wpa_config_blob *blob;
 194         char buf[256], *pos;
 195         unsigned char *encoded = NULL, *nencoded;
 196         int end = 0;
 197         size_t encoded_len = 0, len;
 198
 199         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 200                    *line, name);
 201
 202         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 203                 if (os_strcmp(pos, "}") == 0) {
 204                         end = 1;
 205                         break;
 206                 }
 207
 208                 len = os_strlen(pos);
 209                 nencoded = os_realloc(encoded, encoded_len + len);
 210                 if (nencoded == NULL) {
 211                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 212                                    "blob", *line);
 213                         os_free(encoded);
 214                         return NULL;
 215                 }
 216                 encoded = nencoded;
 217                 os_memcpy(encoded + encoded_len, pos, len);
 218                 encoded_len += len;
 219         }
 220
 221         if (!end) {
 222                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 223                            "properly", *line);
 224                 os_free(encoded);
 225                 return NULL;
 226         }
 227
 228         blob = os_zalloc(sizeof(*blob));
 229         if (blob == NULL) {
 230                 os_free(encoded);
 231                 return NULL;
 232         }
 233         blob->name = os_strdup(name);
 234         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 235         os_free(encoded);
 236
 237         if (blob->name == NULL || blob->data == NULL) {
 238                 wpa_config_free_blob(blob);
 239                 return NULL;
 240         }
 241
 242         return blob;
 243 }
 244
 245
 246 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 247                                    int *line, char *bname)
 248 {
 249         char *name_end;
 250         struct wpa_config_blob *blob;
 251
 252         name_end = os_strchr(bname, '=');
 253         if (name_end == NULL) {
 254                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 255                            *line);
 256                 return -1;
 257         }
 258         *name_end = '\0';
 259
 260         blob = wpa_config_read_blob(f, line, bname);
 261         if (blob == NULL) {
 262                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 263                            *line, bname);
 264                 return -1;
 265         }
 266         wpa_config_set_blob(config, blob);
 267         return 0;
 268 }
 269 #endif /* CONFIG_NO_CONFIG_BLOBS */
 270
 271
 272 struct wpa_config * wpa_config_read(const char *name)
 273 {
 274         FILE *f;
 275         char buf[256], *pos;
 276         int errors = 0, line = 0;
 277         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 278         struct wpa_config *config;
 279         int id = 0;
 280
 281         config = wpa_config_alloc_empty(NULL, NULL);
 282         if (config == NULL)
 283                 return NULL;
 284         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 285         f = fopen(name, "r");
 286         if (f == NULL) {
 287                 os_free(config);
 288                 return NULL;
 289         }
 290
 291         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 292                 if (os_strcmp(pos, "network={") == 0) {
 293                         ssid = wpa_config_read_network(f, &line, id++);
 294                         if (ssid == NULL) {
 295                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 296                                            "parse network block.", line);
 297                                 errors++;
 298                                 continue;
 299                         }
 300                         if (head == NULL) {
 301                                 head = tail = ssid;
 302                         } else {
 303                                 tail->next = ssid;
 304                                 tail = ssid;
 305                         }
 306                         if (wpa_config_add_prio_network(config, ssid)) {
 307                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 308                                            "network block to priority list.",
 309                                            line);
 310                                 errors++;
 311                                 continue;
 312                         }
 313 #ifndef CONFIG_NO_CONFIG_BLOBS
 314                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 315                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 316                             < 0) {
 317                                 errors++;
 318                                 continue;
 319                         }
 320 #endif /* CONFIG_NO_CONFIG_BLOBS */
 321                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 322                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 323                                    "line '%s'.", line, pos);
 324                         errors++;
 325                         continue;
 326                 }
 327         }
 328
 329         fclose(f);
 330
 331         config->ssid = head;
 332         wpa_config_debug_dump_networks(config);
 333
 334 #ifndef WPA_IGNORE_CONFIG_ERRORS
 335         if (errors) {
 336                 wpa_config_free(config);
 337                 config = NULL;
 338                 head = NULL;
 339         }
 340 #endif /* WPA_IGNORE_CONFIG_ERRORS */
 341
 342         return config;
 343 }
 344
 345
 346 #ifndef CONFIG_NO_CONFIG_WRITE
 347
 348 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 349 {
 350         char *value = wpa_config_get(ssid, field);
 351         if (value == NULL)
 352                 return;
 353         fprintf(f, "\t%s=%s\n", field, value);
 354         os_free(value);
 355 }
 356
 357
 358 static void write_int(FILE *f, const char *field, int value, int def)
 359 {
 360         if (value == def)
 361                 return;
 362         fprintf(f, "\t%s=%d\n", field, value);
 363 }
 364
 365
 366 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 367 {
 368         char *value = wpa_config_get(ssid, "bssid");
 369         if (value == NULL)
 370                 return;
 371         fprintf(f, "\tbssid=%s\n", value);
 372         os_free(value);
 373 }
 374
 375
 376 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 377 {
 378         char *value = wpa_config_get(ssid, "psk");
 379         if (value == NULL)
 380                 return;
 381         fprintf(f, "\tpsk=%s\n", value);
 382         os_free(value);
 383 }
 384
 385
 386 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 387 {
 388         char *value;
 389
 390         if (ssid->proto == DEFAULT_PROTO)
 391                 return;
 392
 393         value = wpa_config_get(ssid, "proto");
 394         if (value == NULL)
 395                 return;
 396         if (value[0])
 397                 fprintf(f, "\tproto=%s\n", value);
 398         os_free(value);
 399 }
 400
 401
 402 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 403 {
 404         char *value;
 405
 406         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 407                 return;
 408
 409         value = wpa_config_get(ssid, "key_mgmt");
 410         if (value == NULL)
 411                 return;
 412         if (value[0])
 413                 fprintf(f, "\tkey_mgmt=%s\n", value);
 414         os_free(value);
 415 }
 416
 417
 418 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 419 {
 420         char *value;
 421
 422         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 423                 return;
 424
 425         value = wpa_config_get(ssid, "pairwise");
 426         if (value == NULL)
 427                 return;
 428         if (value[0])
 429                 fprintf(f, "\tpairwise=%s\n", value);
 430         os_free(value);
 431 }
 432
 433
 434 static void write_group(FILE *f, struct wpa_ssid *ssid)
 435 {
 436         char *value;
 437
 438         if (ssid->group_cipher == DEFAULT_GROUP)
 439                 return;
 440
 441         value = wpa_config_get(ssid, "group");
 442         if (value == NULL)
 443                 return;
 444         if (value[0])
 445                 fprintf(f, "\tgroup=%s\n", value);
 446         os_free(value);
 447 }
 448
 449
 450 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 451 {
 452         char *value;
 453
 454         if (ssid->auth_alg == 0)
 455                 return;
 456
 457         value = wpa_config_get(ssid, "auth_alg");
 458         if (value == NULL)
 459                 return;
 460         if (value[0])
 461                 fprintf(f, "\tauth_alg=%s\n", value);
 462         os_free(value);
 463 }
 464
 465
 466 #ifdef IEEE8021X_EAPOL
 467 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 468 {
 469         char *value;
 470
 471         value = wpa_config_get(ssid, "eap");
 472         if (value == NULL)
 473                 return;
 474
 475         if (value[0])
 476                 fprintf(f, "\teap=%s\n", value);
 477         os_free(value);
 478 }
 479 #endif /* IEEE8021X_EAPOL */
 480
 481
 482 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 483 {
 484         char field[20], *value;
 485         int res;
 486
 487         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 488         if (res < 0 || (size_t) res >= sizeof(field))
 489                 return;
 490         value = wpa_config_get(ssid, field);
 491         if (value) {
 492                 fprintf(f, "\t%s=%s\n", field, value);
 493                 os_free(value);
 494         }
 495 }
 496
 497
 498 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 499 {
 500         int i;
 501
 502 #define STR(t) write_str(f, #t, ssid)
 503 #define INT(t) write_int(f, #t, ssid->t, 0)
 504 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 505 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 506 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 507
 508         STR(ssid);
 509         INT(scan_ssid);
 510         write_bssid(f, ssid);
 511         write_psk(f, ssid);
 512         write_proto(f, ssid);
 513         write_key_mgmt(f, ssid);
 514         write_pairwise(f, ssid);
 515         write_group(f, ssid);
 516         write_auth_alg(f, ssid);
 517 #ifdef IEEE8021X_EAPOL
 518         write_eap(f, ssid);
 519         STR(identity);
 520         STR(anonymous_identity);
 521         STR(password);
 522         STR(ca_cert);
 523         STR(ca_path);
 524         STR(client_cert);
 525         STR(private_key);
 526         STR(private_key_passwd);
 527         STR(dh_file);
 528         STR(subject_match);
 529         STR(altsubject_match);
 530         STR(ca_cert2);
 531         STR(ca_path2);
 532         STR(client_cert2);
 533         STR(private_key2);
 534         STR(private_key2_passwd);
 535         STR(dh_file2);
 536         STR(subject_match2);
 537         STR(altsubject_match2);
 538         STR(phase1);
 539         STR(phase2);
 540         STR(pcsc);
 541         STR(pin);
 542         STR(engine_id);
 543         STR(key_id);
 544         STR(cert_id);
 545         STR(ca_cert_id);
 546         STR(key2_id);
 547         STR(pin2);
 548         STR(engine2_id);
 549         STR(cert2_id);
 550         STR(ca_cert2_id);
 551         INTe(engine);
 552         INTe(engine2);
 553         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 554 #endif /* IEEE8021X_EAPOL */
 555         for (i = 0; i < 4; i++)
 556                 write_wep_key(f, i, ssid);
 557         INT(wep_tx_keyidx);
 558         INT(priority);
 559 #ifdef IEEE8021X_EAPOL
 560         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 561         STR(pac_file);
 562         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 563 #endif /* IEEE8021X_EAPOL */
 564         INT(mode);
 565         INT(proactive_key_caching);
 566         INT(disabled);
 567         INT(peerkey);
 568 #ifdef CONFIG_IEEE80211W
 569         INT(ieee80211w);
 570 #endif /* CONFIG_IEEE80211W */
 571         STR(id_str);
 572
 573 #undef STR
 574 #undef INT
 575 #undef INT_DEF
 576 }
 577
 578
 579 #ifndef CONFIG_NO_CONFIG_BLOBS
 580 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 581 {
 582         unsigned char *encoded;
 583
 584         encoded = base64_encode(blob->data, blob->len, NULL);
 585         if (encoded == NULL)
 586                 return -1;
 587
 588         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 589         os_free(encoded);
 590         return 0;
 591 }
 592 #endif /* CONFIG_NO_CONFIG_BLOBS */
 593
 594
 595 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 596 {
 597 #ifdef CONFIG_CTRL_IFACE
 598         if (config->ctrl_interface)
 599                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 600         if (config->ctrl_interface_group)
 601                 fprintf(f, "ctrl_interface_group=%s\n",
 602                         config->ctrl_interface_group);
 603 #endif /* CONFIG_CTRL_IFACE */
 604         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 605                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 606         if (config->ap_scan != DEFAULT_AP_SCAN)
 607                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 608         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 609                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 610         if (config->opensc_engine_path)
 611                 fprintf(f, "opensc_engine_path=%s\n",
 612                         config->opensc_engine_path);
 613         if (config->pkcs11_engine_path)
 614                 fprintf(f, "pkcs11_engine_path=%s\n",
 615                         config->pkcs11_engine_path);
 616         if (config->pkcs11_module_path)
 617                 fprintf(f, "pkcs11_module_path=%s\n",
 618                         config->pkcs11_module_path);
 619         if (config->driver_param)
 620                 fprintf(f, "driver_param=%s\n", config->driver_param);
 621         if (config->dot11RSNAConfigPMKLifetime)
 622                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 623                         config->dot11RSNAConfigPMKLifetime);
 624         if (config->dot11RSNAConfigPMKReauthThreshold)
 625                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 626                         config->dot11RSNAConfigPMKReauthThreshold);
 627         if (config->dot11RSNAConfigSATimeout)
 628                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 629                         config->dot11RSNAConfigSATimeout);
 630         if (config->update_config)
 631                 fprintf(f, "update_config=%d\n", config->update_config);
 632 #ifdef CONFIG_WPS
 633         if (!is_nil_uuid(config->uuid)) {
 634                 char buf[40];
 635                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 636                 fprintf(f, "uuid=%s\n", buf);
 637         }
 638         if (config->device_name)
 639                 fprintf(f, "device_name=%s\n", config->device_name);
 640         if (config->manufacturer)
 641                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 642         if (config->model_name)
 643                 fprintf(f, "model_name=%s\n", config->model_name);
 644         if (config->model_number)
 645                 fprintf(f, "model_number=%s\n", config->model_number);
 646         if (config->serial_number)
 647                 fprintf(f, "serial_number=%s\n", config->serial_number);
 648         {
 649                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 650                 buf = wps_dev_type_bin2str(config->device_type,
 651                                            _buf, sizeof(_buf));
 652                 fprintf(f, "device_type=%s\n", buf);
 653         }
 654         if (WPA_GET_BE32(config->os_version))
 655                 fprintf(f, "os_version=%08x\n",
 656                         WPA_GET_BE32(config->os_version));
 657         if (config->config_methods)
 658                 fprintf(f, "config_methods=%s\n", config->config_methods);
 659         if (config->wps_cred_processing)
 660                 fprintf(f, "wps_cred_processing=%d\n",
 661                         config->wps_cred_processing);
 662 #endif /* CONFIG_WPS */
 663 #ifdef CONFIG_P2P
 664         if (config->p2p_listen_reg_class)
 665                 fprintf(f, "p2p_listen_reg_class=%u\n",
 666                         config->p2p_listen_reg_class);
 667         if (config->p2p_listen_channel)
 668                 fprintf(f, "p2p_listen_channel=%u\n",
 669                         config->p2p_listen_channel);
 670         if (config->p2p_oper_reg_class)
 671                 fprintf(f, "p2p_oper_reg_class=%u\n",
 672                         config->p2p_oper_reg_class);
 673         if (config->p2p_oper_channel)
 674                 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
 675         if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
 676                 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
 677         if (config->p2p_ssid_postfix)
 678                 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
 679         if (config->persistent_reconnect)
 680                 fprintf(f, "persistent_reconnect=%u\n",
 681                         config->persistent_reconnect);
 682         if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
 683                 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
 684         if (config->p2p_group_idle)
 685                 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
 686 #endif /* CONFIG_P2P */
 687         if (config->country[0] && config->country[1]) {
 688                 fprintf(f, "country=%c%c\n",
 689                         config->country[0], config->country[1]);
 690         }
 691         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
 692                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
 693         if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
 694                 fprintf(f, "bss_expiration_age=%u\n",
 695                         config->bss_expiration_age);
 696         if (config->bss_expiration_scan_count !=
 697             DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
 698                 fprintf(f, "bss_expiration_scan_count=%u\n",
 699                         config->bss_expiration_scan_count);
 700         if (config->filter_ssids)
 701                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
 702         if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
 703                 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
 704         if (config->disassoc_low_ack)
 705                 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
 706         if (config->home_realm)
 707                 fprintf(f, "home_realm=%s\n", config->home_realm);
 708         if (config->interworking)
 709                 fprintf(f, "interworking=%u\n", config->interworking);
 710         if (!is_zero_ether_addr(config->hessid))
 711                 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
 712 }
 713
 714 #endif /* CONFIG_NO_CONFIG_WRITE */
 715
 716
 717 int wpa_config_write(const char *name, struct wpa_config *config)
 718 {
 719 #ifndef CONFIG_NO_CONFIG_WRITE
 720         FILE *f;
 721         struct wpa_ssid *ssid;
 722 #ifndef CONFIG_NO_CONFIG_BLOBS
 723         struct wpa_config_blob *blob;
 724 #endif /* CONFIG_NO_CONFIG_BLOBS */
 725         int ret = 0;
 726
 727         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 728
 729         f = fopen(name, "w");
 730         if (f == NULL) {
 731                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 732                 return -1;
 733         }
 734
 735         wpa_config_write_global(f, config);
 736
 737         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 738                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
 739                         continue; /* do not save temporary networks */
 740                 fprintf(f, "\nnetwork={\n");
 741                 wpa_config_write_network(f, ssid);
 742                 fprintf(f, "}\n");
 743         }
 744
 745 #ifndef CONFIG_NO_CONFIG_BLOBS
 746         for (blob = config->blobs; blob; blob = blob->next) {
 747                 ret = wpa_config_write_blob(f, blob);
 748                 if (ret)
 749                         break;
 750         }
 751 #endif /* CONFIG_NO_CONFIG_BLOBS */
 752
 753         fclose(f);
 754
 755         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
 756                    name, ret ? "un" : "");
 757         return ret;
 758 #else /* CONFIG_NO_CONFIG_WRITE */
 759         return -1;
 760 #endif /* CONFIG_NO_CONFIG_WRITE */
 761 }