config_file.c

   1 /*
   2  * WPA Supplicant / Configuration backend: text file
   3  * Copyright (c) 2003-2006, 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 "eap_methods.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) && !ssid->psk_set) {
 108                 wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
 109                            "management, but no PSK configured.", line);
 110                 errors++;
 111         }
 112
 113         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 114             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 115             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 116                 /* Group cipher cannot be stronger than the pairwise cipher. */
 117                 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
 118                            " list since it was not allowed for pairwise "
 119                            "cipher", line);
 120                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 121         }
 122
 123         return errors;
 124 }
 125
 126
 127 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
 128 {
 129         struct wpa_ssid *ssid;
 130         int errors = 0, end = 0;
 131         char buf[256], *pos, *pos2;
 132
 133         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
 134                    *line);
 135         ssid = os_zalloc(sizeof(*ssid));
 136         if (ssid == NULL)
 137                 return NULL;
 138         ssid->id = id;
 139
 140         wpa_config_set_network_defaults(ssid);
 141
 142         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 143                 if (os_strcmp(pos, "}") == 0) {
 144                         end = 1;
 145                         break;
 146                 }
 147
 148                 pos2 = os_strchr(pos, '=');
 149                 if (pos2 == NULL) {
 150                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 151                                    "'%s'.", *line, pos);
 152                         errors++;
 153                         continue;
 154                 }
 155
 156                 *pos2++ = '\0';
 157                 if (*pos2 == '"') {
 158                         if (os_strchr(pos2 + 1, '"') == NULL) {
 159                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 160                                            "quotation '%s'.", *line, pos2);
 161                                 errors++;
 162                                 continue;
 163                         }
 164                 }
 165
 166                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 167                         errors++;
 168         }
 169
 170         if (!end) {
 171                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 172                            "terminated properly.", *line);
 173                 errors++;
 174         }
 175
 176         errors += wpa_config_validate_network(ssid, *line);
 177
 178         if (errors) {
 179                 wpa_config_free_ssid(ssid);
 180                 ssid = NULL;
 181         }
 182
 183         return ssid;
 184 }
 185
 186
 187 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 188                                                      const char *name)
 189 {
 190         struct wpa_config_blob *blob;
 191         char buf[256], *pos;
 192         unsigned char *encoded = NULL, *nencoded;
 193         int end = 0;
 194         size_t encoded_len = 0, len;
 195
 196         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 197                    *line, name);
 198
 199         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 200                 if (os_strcmp(pos, "}") == 0) {
 201                         end = 1;
 202                         break;
 203                 }
 204
 205                 len = os_strlen(pos);
 206                 nencoded = os_realloc(encoded, encoded_len + len);
 207                 if (nencoded == NULL) {
 208                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 209                                    "blob", *line);
 210                         os_free(encoded);
 211                         return NULL;
 212                 }
 213                 encoded = nencoded;
 214                 os_memcpy(encoded + encoded_len, pos, len);
 215                 encoded_len += len;
 216         }
 217
 218         if (!end) {
 219                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 220                            "properly", *line);
 221                 os_free(encoded);
 222                 return NULL;
 223         }
 224
 225         blob = os_zalloc(sizeof(*blob));
 226         if (blob == NULL) {
 227                 os_free(encoded);
 228                 return NULL;
 229         }
 230         blob->name = os_strdup(name);
 231         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 232         os_free(encoded);
 233
 234         if (blob->name == NULL || blob->data == NULL) {
 235                 wpa_config_free_blob(blob);
 236                 return NULL;
 237         }
 238
 239         return blob;
 240 }
 241
 242
 243 struct wpa_config * wpa_config_read(const char *name)
 244 {
 245         FILE *f;
 246         char buf[256], *pos;
 247         int errors = 0, line = 0;
 248         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 249         struct wpa_config *config;
 250         int id = 0;
 251
 252         config = wpa_config_alloc_empty(NULL, NULL);
 253         if (config == NULL)
 254                 return NULL;
 255         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 256         f = fopen(name, "r");
 257         if (f == NULL) {
 258                 os_free(config);
 259                 return NULL;
 260         }
 261
 262         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 263                 if (os_strcmp(pos, "network={") == 0) {
 264                         ssid = wpa_config_read_network(f, &line, id++);
 265                         if (ssid == NULL) {
 266                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 267                                            "parse network block.", line);
 268 #ifndef WPA_IGNORE_CONFIG_ERRORS
 269                                 errors++;
 270 #endif
 271                                 continue;
 272                         }
 273                         if (head == NULL) {
 274                                 head = tail = ssid;
 275                         } else {
 276                                 tail->next = ssid;
 277                                 tail = ssid;
 278                         }
 279                         if (wpa_config_add_prio_network(config, ssid)) {
 280                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 281                                            "network block to priority list.",
 282                                            line);
 283                                 errors++;
 284                                 continue;
 285                         }
 286                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 287                         char *bname = pos + 12, *name_end;
 288                         struct wpa_config_blob *blob;
 289
 290                         name_end = os_strchr(bname, '=');
 291                         if (name_end == NULL) {
 292                                 wpa_printf(MSG_ERROR, "Line %d: no blob name "
 293                                            "terminator", line);
 294                                 errors++;
 295                                 continue;
 296                         }
 297                         *name_end = '\0';
 298
 299                         blob = wpa_config_read_blob(f, &line, bname);
 300                         if (blob == NULL) {
 301                                 wpa_printf(MSG_ERROR, "Line %d: failed to read"
 302                                            " blob %s", line, bname);
 303                                 errors++;
 304                                 continue;
 305                         }
 306                         wpa_config_set_blob(config, blob);
 307 #ifdef CONFIG_CTRL_IFACE
 308                 } else if (os_strncmp(pos, "ctrl_interface=", 15) == 0) {
 309                         os_free(config->ctrl_interface);
 310                         config->ctrl_interface = os_strdup(pos + 15);
 311                         wpa_printf(MSG_DEBUG, "ctrl_interface='%s'",
 312                                    config->ctrl_interface);
 313                 } else if (os_strncmp(pos, "ctrl_interface_group=", 21) == 0) {
 314                         os_free(config->ctrl_interface_group);
 315                         config->ctrl_interface_group = os_strdup(pos + 21);
 316                         wpa_printf(MSG_DEBUG, "ctrl_interface_group='%s' "
 317                                    "(DEPRECATED)",
 318                                    config->ctrl_interface_group);
 319 #endif /* CONFIG_CTRL_IFACE */
 320                 } else if (os_strncmp(pos, "eapol_version=", 14) == 0) {
 321                         config->eapol_version = atoi(pos + 14);
 322                         if (config->eapol_version < 1 ||
 323                             config->eapol_version > 2) {
 324                                 wpa_printf(MSG_ERROR, "Line %d: Invalid EAPOL "
 325                                            "version (%d): '%s'.",
 326                                            line, config->eapol_version, pos);
 327                                 errors++;
 328                                 continue;
 329                         }
 330                         wpa_printf(MSG_DEBUG, "eapol_version=%d",
 331                                    config->eapol_version);
 332                 } else if (os_strncmp(pos, "ap_scan=", 8) == 0) {
 333                         config->ap_scan = atoi(pos + 8);
 334                         wpa_printf(MSG_DEBUG, "ap_scan=%d", config->ap_scan);
 335                 } else if (os_strncmp(pos, "fast_reauth=", 12) == 0) {
 336                         config->fast_reauth = atoi(pos + 12);
 337                         wpa_printf(MSG_DEBUG, "fast_reauth=%d",
 338                                    config->fast_reauth);
 339                 } else if (os_strncmp(pos, "opensc_engine_path=", 19) == 0) {
 340                         os_free(config->opensc_engine_path);
 341                         config->opensc_engine_path = os_strdup(pos + 19);
 342                         wpa_printf(MSG_DEBUG, "opensc_engine_path='%s'",
 343                                    config->opensc_engine_path);
 344                 } else if (os_strncmp(pos, "pkcs11_engine_path=", 19) == 0) {
 345                         os_free(config->pkcs11_engine_path);
 346                         config->pkcs11_engine_path = os_strdup(pos + 19);
 347                         wpa_printf(MSG_DEBUG, "pkcs11_engine_path='%s'",
 348                                    config->pkcs11_engine_path);
 349                 } else if (os_strncmp(pos, "pkcs11_module_path=", 19) == 0) {
 350                         os_free(config->pkcs11_module_path);
 351                         config->pkcs11_module_path = os_strdup(pos + 19);
 352                         wpa_printf(MSG_DEBUG, "pkcs11_module_path='%s'",
 353                                    config->pkcs11_module_path);
 354                 } else if (os_strncmp(pos, "driver_param=", 13) == 0) {
 355                         os_free(config->driver_param);
 356                         config->driver_param = os_strdup(pos + 13);
 357                         wpa_printf(MSG_DEBUG, "driver_param='%s'",
 358                                    config->driver_param);
 359                 } else if (os_strncmp(pos, "dot11RSNAConfigPMKLifetime=", 27)
 360                            == 0) {
 361                         config->dot11RSNAConfigPMKLifetime = atoi(pos + 27);
 362                         wpa_printf(MSG_DEBUG, "dot11RSNAConfigPMKLifetime=%d",
 363                                    config->dot11RSNAConfigPMKLifetime);
 364                 } else if (os_strncmp(pos,
 365                                       "dot11RSNAConfigPMKReauthThreshold=", 34)
 366                            == 0) {
 367                         config->dot11RSNAConfigPMKReauthThreshold =
 368                                 atoi(pos + 34);
 369                         wpa_printf(MSG_DEBUG,
 370                                    "dot11RSNAConfigPMKReauthThreshold=%d",
 371                                    config->dot11RSNAConfigPMKReauthThreshold);
 372                 } else if (os_strncmp(pos, "dot11RSNAConfigSATimeout=", 25) ==
 373                            0) {
 374                         config->dot11RSNAConfigSATimeout = atoi(pos + 25);
 375                         wpa_printf(MSG_DEBUG, "dot11RSNAConfigSATimeout=%d",
 376                                    config->dot11RSNAConfigSATimeout);
 377                 } else if (os_strncmp(pos, "update_config=", 14) == 0) {
 378                         config->update_config = atoi(pos + 14);
 379                         wpa_printf(MSG_DEBUG, "update_config=%d",
 380                                    config->update_config);
 381                 } else if (os_strncmp(pos, "load_dynamic_eap=", 17) == 0) {
 382                         char *so = pos + 17;
 383                         int ret;
 384                         wpa_printf(MSG_DEBUG, "load_dynamic_eap=%s", so);
 385                         ret = eap_peer_method_load(so);
 386                         if (ret == -2) {
 387                                 wpa_printf(MSG_DEBUG, "This EAP type was "
 388                                            "already loaded - not reloading.");
 389                         } else if (ret) {
 390                                 wpa_printf(MSG_ERROR, "Line %d: Failed to "
 391                                            "load dynamic EAP method '%s'.",
 392                                            line, so);
 393                                 errors++;
 394                         }
 395                 } else {
 396                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 397                                    "line '%s'.", line, pos);
 398                         errors++;
 399                         continue;
 400                 }
 401         }
 402
 403         fclose(f);
 404
 405         config->ssid = head;
 406         wpa_config_debug_dump_networks(config);
 407
 408 #ifndef WPA_IGNORE_CONFIG_ERRORS
 409         if (errors) {
 410                 wpa_config_free(config);
 411                 config = NULL;
 412                 head = NULL;
 413         }
 414 #endif
 415         return config;
 416 }
 417
 418
 419 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 420 {
 421         char *value = wpa_config_get(ssid, field);
 422         if (value == NULL)
 423                 return;
 424         fprintf(f, "\t%s=%s\n", field, value);
 425         os_free(value);
 426 }
 427
 428
 429 static void write_int(FILE *f, const char *field, int value, int def)
 430 {
 431         if (value == def)
 432                 return;
 433         fprintf(f, "\t%s=%d\n", field, value);
 434 }
 435
 436
 437 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 438 {
 439         char *value = wpa_config_get(ssid, "bssid");
 440         if (value == NULL)
 441                 return;
 442         fprintf(f, "\tbssid=%s\n", value);
 443         os_free(value);
 444 }
 445
 446
 447 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 448 {
 449         char *value = wpa_config_get(ssid, "psk");
 450         if (value == NULL)
 451                 return;
 452         fprintf(f, "\tpsk=%s\n", value);
 453         os_free(value);
 454 }
 455
 456
 457 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 458 {
 459         char *value;
 460
 461         if (ssid->proto == DEFAULT_PROTO)
 462                 return;
 463
 464         value = wpa_config_get(ssid, "proto");
 465         if (value == NULL)
 466                 return;
 467         if (value[0])
 468                 fprintf(f, "\tproto=%s\n", value);
 469         os_free(value);
 470 }
 471
 472
 473 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 474 {
 475         char *value;
 476
 477         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 478                 return;
 479
 480         value = wpa_config_get(ssid, "key_mgmt");
 481         if (value == NULL)
 482                 return;
 483         if (value[0])
 484                 fprintf(f, "\tkey_mgmt=%s\n", value);
 485         os_free(value);
 486 }
 487
 488
 489 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 490 {
 491         char *value;
 492
 493         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 494                 return;
 495
 496         value = wpa_config_get(ssid, "pairwise");
 497         if (value == NULL)
 498                 return;
 499         if (value[0])
 500                 fprintf(f, "\tpairwise=%s\n", value);
 501         os_free(value);
 502 }
 503
 504
 505 static void write_group(FILE *f, struct wpa_ssid *ssid)
 506 {
 507         char *value;
 508
 509         if (ssid->group_cipher == DEFAULT_GROUP)
 510                 return;
 511
 512         value = wpa_config_get(ssid, "group");
 513         if (value == NULL)
 514                 return;
 515         if (value[0])
 516                 fprintf(f, "\tgroup=%s\n", value);
 517         os_free(value);
 518 }
 519
 520
 521 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 522 {
 523         char *value;
 524
 525         if (ssid->auth_alg == 0)
 526                 return;
 527
 528         value = wpa_config_get(ssid, "auth_alg");
 529         if (value == NULL)
 530                 return;
 531         if (value[0])
 532                 fprintf(f, "\tauth_alg=%s\n", value);
 533         os_free(value);
 534 }
 535
 536
 537 #ifdef IEEE8021X_EAPOL
 538 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 539 {
 540         char *value;
 541
 542         value = wpa_config_get(ssid, "eap");
 543         if (value == NULL)
 544                 return;
 545
 546         if (value[0])
 547                 fprintf(f, "\teap=%s\n", value);
 548         os_free(value);
 549 }
 550 #endif /* IEEE8021X_EAPOL */
 551
 552
 553 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 554 {
 555         char field[20], *value;
 556
 557         os_snprintf(field, sizeof(field), "wep_key%d", idx);
 558         value = wpa_config_get(ssid, field);
 559         if (value) {
 560                 fprintf(f, "\t%s=%s\n", field, value);
 561                 os_free(value);
 562         }
 563 }
 564
 565
 566 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 567 {
 568         int i;
 569
 570 #define STR(t) write_str(f, #t, ssid)
 571 #define INT(t) write_int(f, #t, ssid->t, 0)
 572 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 573
 574         STR(ssid);
 575         INT(scan_ssid);
 576         write_bssid(f, ssid);
 577         write_psk(f, ssid);
 578         write_proto(f, ssid);
 579         write_key_mgmt(f, ssid);
 580         write_pairwise(f, ssid);
 581         write_group(f, ssid);
 582         write_auth_alg(f, ssid);
 583 #ifdef IEEE8021X_EAPOL
 584         write_eap(f, ssid);
 585         STR(identity);
 586         STR(anonymous_identity);
 587         STR(eappsk);
 588         STR(nai);
 589         STR(password);
 590         STR(ca_cert);
 591         STR(ca_path);
 592         STR(client_cert);
 593         STR(private_key);
 594         STR(private_key_passwd);
 595         STR(dh_file);
 596         STR(subject_match);
 597         STR(altsubject_match);
 598         STR(ca_cert2);
 599         STR(ca_path2);
 600         STR(client_cert2);
 601         STR(private_key2);
 602         STR(private_key2_passwd);
 603         STR(dh_file2);
 604         STR(subject_match2);
 605         STR(altsubject_match2);
 606         STR(phase1);
 607         STR(phase2);
 608         STR(pcsc);
 609         STR(pin);
 610         STR(engine_id);
 611         STR(key_id);
 612         INT(engine);
 613         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 614 #endif /* IEEE8021X_EAPOL */
 615         for (i = 0; i < 4; i++)
 616                 write_wep_key(f, i, ssid);
 617         INT(wep_tx_keyidx);
 618         INT(priority);
 619 #ifdef IEEE8021X_EAPOL
 620         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 621         STR(pac_file);
 622         INT_DEF(fragment_size, DEFAULT_FRAGMENT_SIZE);
 623 #endif /* IEEE8021X_EAPOL */
 624         INT(mode);
 625         INT(proactive_key_caching);
 626         INT(disabled);
 627         INT(peerkey);
 628 #ifdef CONFIG_IEEE80211W
 629         INT(ieee80211w);
 630 #endif /* CONFIG_IEEE80211W */
 631         STR(id_str);
 632
 633 #undef STR
 634 #undef INT
 635 #undef INT_DEF
 636 }
 637
 638
 639 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 640 {
 641         unsigned char *encoded;
 642
 643         encoded = base64_encode(blob->data, blob->len, NULL);
 644         if (encoded == NULL)
 645                 return -1;
 646
 647         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 648         os_free(encoded);
 649         return 0;
 650 }
 651
 652
 653 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 654 {
 655 #ifdef CONFIG_CTRL_IFACE
 656         if (config->ctrl_interface)
 657                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 658         if (config->ctrl_interface_group)
 659                 fprintf(f, "ctrl_interface_group=%s\n",
 660                         config->ctrl_interface_group);
 661 #endif /* CONFIG_CTRL_IFACE */
 662         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 663                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 664         if (config->ap_scan != DEFAULT_AP_SCAN)
 665                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 666         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 667                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 668         if (config->opensc_engine_path)
 669                 fprintf(f, "opensc_engine_path=%s\n",
 670                         config->opensc_engine_path);
 671         if (config->pkcs11_engine_path)
 672                 fprintf(f, "pkcs11_engine_path=%s\n",
 673                         config->pkcs11_engine_path);
 674         if (config->pkcs11_module_path)
 675                 fprintf(f, "pkcs11_module_path=%s\n",
 676                         config->pkcs11_module_path);
 677         if (config->driver_param)
 678                 fprintf(f, "driver_param=%s\n", config->driver_param);
 679         if (config->dot11RSNAConfigPMKLifetime)
 680                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 681                         config->dot11RSNAConfigPMKLifetime);
 682         if (config->dot11RSNAConfigPMKReauthThreshold)
 683                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 684                         config->dot11RSNAConfigPMKReauthThreshold);
 685         if (config->dot11RSNAConfigSATimeout)
 686                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 687                         config->dot11RSNAConfigSATimeout);
 688         if (config->update_config)
 689                 fprintf(f, "update_config=%d\n", config->update_config);
 690 }
 691
 692
 693 int wpa_config_write(const char *name, struct wpa_config *config)
 694 {
 695         FILE *f;
 696         struct wpa_ssid *ssid;
 697         struct wpa_config_blob *blob;
 698         int ret = 0;
 699
 700         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 701
 702         f = fopen(name, "w");
 703         if (f == NULL) {
 704                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 705                 return -1;
 706         }
 707
 708         wpa_config_write_global(f, config);
 709
 710         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 711                 fprintf(f, "\nnetwork={\n");
 712                 wpa_config_write_network(f, ssid);
 713                 fprintf(f, "}\n");
 714         }
 715
 716         for (blob = config->blobs; blob; blob = blob->next) {
 717                 ret = wpa_config_write_blob(f, blob);
 718                 if (ret)
 719                         break;
 720         }
 721
 722         fclose(f);
 723
 724         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
 725                    name, ret ? "un" : "");
 726         return ret;
 727 }