contrib/wpa_supplicant-0.5.8/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                                 errors++;
 269                                 continue;
 270                         }
 271                         if (head == NULL) {
 272                                 head = tail = ssid;
 273                         } else {
 274                                 tail->next = ssid;
 275                                 tail = ssid;
 276                         }
 277                         if (wpa_config_add_prio_network(config, ssid)) {
 278                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 279                                            "network block to priority list.",
 280                                            line);
 281                                 errors++;
 282                                 continue;
 283                         }
 284                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 285                         char *bname = pos + 12, *name_end;
 286                         struct wpa_config_blob *blob;
 287
 288                         name_end = os_strchr(bname, '=');
 289                         if (name_end == NULL) {
 290                                 wpa_printf(MSG_ERROR, "Line %d: no blob name "
 291                                            "terminator", line);
 292                                 errors++;
 293                                 continue;
 294                         }
 295                         *name_end = '\0';
 296
 297                         blob = wpa_config_read_blob(f, &line, bname);
 298                         if (blob == NULL) {
 299                                 wpa_printf(MSG_ERROR, "Line %d: failed to read"
 300                                            " blob %s", line, bname);
 301                                 errors++;
 302                                 continue;
 303                         }
 304                         wpa_config_set_blob(config, blob);
 305 #ifdef CONFIG_CTRL_IFACE
 306                 } else if (os_strncmp(pos, "ctrl_interface=", 15) == 0) {
 307                         os_free(config->ctrl_interface);
 308                         config->ctrl_interface = os_strdup(pos + 15);
 309                         wpa_printf(MSG_DEBUG, "ctrl_interface='%s'",
 310                                    config->ctrl_interface);
 311                 } else if (os_strncmp(pos, "ctrl_interface_group=", 21) == 0) {
 312                         os_free(config->ctrl_interface_group);
 313                         config->ctrl_interface_group = os_strdup(pos + 21);
 314                         wpa_printf(MSG_DEBUG, "ctrl_interface_group='%s' "
 315                                    "(DEPRECATED)",
 316                                    config->ctrl_interface_group);
 317 #endif /* CONFIG_CTRL_IFACE */
 318                 } else if (os_strncmp(pos, "eapol_version=", 14) == 0) {
 319                         config->eapol_version = atoi(pos + 14);
 320                         if (config->eapol_version < 1 ||
 321                             config->eapol_version > 2) {
 322                                 wpa_printf(MSG_ERROR, "Line %d: Invalid EAPOL "
 323                                            "version (%d): '%s'.",
 324                                            line, config->eapol_version, pos);
 325                                 errors++;
 326                                 continue;
 327                         }
 328                         wpa_printf(MSG_DEBUG, "eapol_version=%d",
 329                                    config->eapol_version);
 330                 } else if (os_strncmp(pos, "ap_scan=", 8) == 0) {
 331                         config->ap_scan = atoi(pos + 8);
 332                         wpa_printf(MSG_DEBUG, "ap_scan=%d", config->ap_scan);
 333                 } else if (os_strncmp(pos, "fast_reauth=", 12) == 0) {
 334                         config->fast_reauth = atoi(pos + 12);
 335                         wpa_printf(MSG_DEBUG, "fast_reauth=%d",
 336                                    config->fast_reauth);
 337                 } else if (os_strncmp(pos, "opensc_engine_path=", 19) == 0) {
 338                         os_free(config->opensc_engine_path);
 339                         config->opensc_engine_path = os_strdup(pos + 19);
 340                         wpa_printf(MSG_DEBUG, "opensc_engine_path='%s'",
 341                                    config->opensc_engine_path);
 342                 } else if (os_strncmp(pos, "pkcs11_engine_path=", 19) == 0) {
 343                         os_free(config->pkcs11_engine_path);
 344                         config->pkcs11_engine_path = os_strdup(pos + 19);
 345                         wpa_printf(MSG_DEBUG, "pkcs11_engine_path='%s'",
 346                                    config->pkcs11_engine_path);
 347                 } else if (os_strncmp(pos, "pkcs11_module_path=", 19) == 0) {
 348                         os_free(config->pkcs11_module_path);
 349                         config->pkcs11_module_path = os_strdup(pos + 19);
 350                         wpa_printf(MSG_DEBUG, "pkcs11_module_path='%s'",
 351                                    config->pkcs11_module_path);
 352                 } else if (os_strncmp(pos, "driver_param=", 13) == 0) {
 353                         os_free(config->driver_param);
 354                         config->driver_param = os_strdup(pos + 13);
 355                         wpa_printf(MSG_DEBUG, "driver_param='%s'",
 356                                    config->driver_param);
 357                 } else if (os_strncmp(pos, "dot11RSNAConfigPMKLifetime=", 27)
 358                            == 0) {
 359                         config->dot11RSNAConfigPMKLifetime = atoi(pos + 27);
 360                         wpa_printf(MSG_DEBUG, "dot11RSNAConfigPMKLifetime=%d",
 361                                    config->dot11RSNAConfigPMKLifetime);
 362                 } else if (os_strncmp(pos,
 363                                       "dot11RSNAConfigPMKReauthThreshold=", 34)
 364                            == 0) {
 365                         config->dot11RSNAConfigPMKReauthThreshold =
 366                                 atoi(pos + 34);
 367                         wpa_printf(MSG_DEBUG,
 368                                    "dot11RSNAConfigPMKReauthThreshold=%d",
 369                                    config->dot11RSNAConfigPMKReauthThreshold);
 370                 } else if (os_strncmp(pos, "dot11RSNAConfigSATimeout=", 25) ==
 371                            0) {
 372                         config->dot11RSNAConfigSATimeout = atoi(pos + 25);
 373                         wpa_printf(MSG_DEBUG, "dot11RSNAConfigSATimeout=%d",
 374                                    config->dot11RSNAConfigSATimeout);
 375                 } else if (os_strncmp(pos, "update_config=", 14) == 0) {
 376                         config->update_config = atoi(pos + 14);
 377                         wpa_printf(MSG_DEBUG, "update_config=%d",
 378                                    config->update_config);
 379                 } else if (os_strncmp(pos, "load_dynamic_eap=", 17) == 0) {
 380                         char *so = pos + 17;
 381                         int ret;
 382                         wpa_printf(MSG_DEBUG, "load_dynamic_eap=%s", so);
 383                         ret = eap_peer_method_load(so);
 384                         if (ret == -2) {
 385                                 wpa_printf(MSG_DEBUG, "This EAP type was "
 386                                            "already loaded - not reloading.");
 387                         } else if (ret) {
 388                                 wpa_printf(MSG_ERROR, "Line %d: Failed to "
 389                                            "load dynamic EAP method '%s'.",
 390                                            line, so);
 391                                 errors++;
 392                         }
 393                 } else {
 394                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 395                                    "line '%s'.", line, pos);
 396                         errors++;
 397                         continue;
 398                 }
 399         }
 400
 401         fclose(f);
 402
 403         config->ssid = head;
 404         wpa_config_debug_dump_networks(config);
 405
 406         if (errors) {
 407                 wpa_config_free(config);
 408                 config = NULL;
 409                 head = NULL;
 410         }
 411
 412         return config;
 413 }
 414
 415
 416 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 417 {
 418         char *value = wpa_config_get(ssid, field);
 419         if (value == NULL)
 420                 return;
 421         fprintf(f, "\t%s=%s\n", field, value);
 422         os_free(value);
 423 }
 424
 425
 426 static void write_int(FILE *f, const char *field, int value, int def)
 427 {
 428         if (value == def)
 429                 return;
 430         fprintf(f, "\t%s=%d\n", field, value);
 431 }
 432
 433
 434 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 435 {
 436         char *value = wpa_config_get(ssid, "bssid");
 437         if (value == NULL)
 438                 return;
 439         fprintf(f, "\tbssid=%s\n", value);
 440         os_free(value);
 441 }
 442
 443
 444 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 445 {
 446         char *value = wpa_config_get(ssid, "psk");
 447         if (value == NULL)
 448                 return;
 449         fprintf(f, "\tpsk=%s\n", value);
 450         os_free(value);
 451 }
 452
 453
 454 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 455 {
 456         char *value;
 457
 458         if (ssid->proto == DEFAULT_PROTO)
 459                 return;
 460
 461         value = wpa_config_get(ssid, "proto");
 462         if (value == NULL)
 463                 return;
 464         if (value[0])
 465                 fprintf(f, "\tproto=%s\n", value);
 466         os_free(value);
 467 }
 468
 469
 470 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 471 {
 472         char *value;
 473
 474         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 475                 return;
 476
 477         value = wpa_config_get(ssid, "key_mgmt");
 478         if (value == NULL)
 479                 return;
 480         if (value[0])
 481                 fprintf(f, "\tkey_mgmt=%s\n", value);
 482         os_free(value);
 483 }
 484
 485
 486 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 487 {
 488         char *value;
 489
 490         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 491                 return;
 492
 493         value = wpa_config_get(ssid, "pairwise");
 494         if (value == NULL)
 495                 return;
 496         if (value[0])
 497                 fprintf(f, "\tpairwise=%s\n", value);
 498         os_free(value);
 499 }
 500
 501
 502 static void write_group(FILE *f, struct wpa_ssid *ssid)
 503 {
 504         char *value;
 505
 506         if (ssid->group_cipher == DEFAULT_GROUP)
 507                 return;
 508
 509         value = wpa_config_get(ssid, "group");
 510         if (value == NULL)
 511                 return;
 512         if (value[0])
 513                 fprintf(f, "\tgroup=%s\n", value);
 514         os_free(value);
 515 }
 516
 517
 518 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 519 {
 520         char *value;
 521
 522         if (ssid->auth_alg == 0)
 523                 return;
 524
 525         value = wpa_config_get(ssid, "auth_alg");
 526         if (value == NULL)
 527                 return;
 528         if (value[0])
 529                 fprintf(f, "\tauth_alg=%s\n", value);
 530         os_free(value);
 531 }
 532
 533
 534 #ifdef IEEE8021X_EAPOL
 535 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 536 {
 537         char *value;
 538
 539         value = wpa_config_get(ssid, "eap");
 540         if (value == NULL)
 541                 return;
 542
 543         if (value[0])
 544                 fprintf(f, "\teap=%s\n", value);
 545         os_free(value);
 546 }
 547 #endif /* IEEE8021X_EAPOL */
 548
 549
 550 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 551 {
 552         char field[20], *value;
 553
 554         os_snprintf(field, sizeof(field), "wep_key%d", idx);
 555         value = wpa_config_get(ssid, field);
 556         if (value) {
 557                 fprintf(f, "\t%s=%s\n", field, value);
 558                 os_free(value);
 559         }
 560 }
 561
 562
 563 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 564 {
 565         int i;
 566
 567 #define STR(t) write_str(f, #t, ssid)
 568 #define INT(t) write_int(f, #t, ssid->t, 0)
 569 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 570
 571         STR(ssid);
 572         INT(scan_ssid);
 573         write_bssid(f, ssid);
 574         write_psk(f, ssid);
 575         write_proto(f, ssid);
 576         write_key_mgmt(f, ssid);
 577         write_pairwise(f, ssid);
 578         write_group(f, ssid);
 579         write_auth_alg(f, ssid);
 580 #ifdef IEEE8021X_EAPOL
 581         write_eap(f, ssid);
 582         STR(identity);
 583         STR(anonymous_identity);
 584         STR(eappsk);
 585         STR(nai);
 586         STR(password);
 587         STR(ca_cert);
 588         STR(ca_path);
 589         STR(client_cert);
 590         STR(private_key);
 591         STR(private_key_passwd);
 592         STR(dh_file);
 593         STR(subject_match);
 594         STR(altsubject_match);
 595         STR(ca_cert2);
 596         STR(ca_path2);
 597         STR(client_cert2);
 598         STR(private_key2);
 599         STR(private_key2_passwd);
 600         STR(dh_file2);
 601         STR(subject_match2);
 602         STR(altsubject_match2);
 603         STR(phase1);
 604         STR(phase2);
 605         STR(pcsc);
 606         STR(pin);
 607         STR(engine_id);
 608         STR(key_id);
 609         INT(engine);
 610         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 611 #endif /* IEEE8021X_EAPOL */
 612         for (i = 0; i < 4; i++)
 613                 write_wep_key(f, i, ssid);
 614         INT(wep_tx_keyidx);
 615         INT(priority);
 616 #ifdef IEEE8021X_EAPOL
 617         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 618         STR(pac_file);
 619         INT_DEF(fragment_size, DEFAULT_FRAGMENT_SIZE);
 620 #endif /* IEEE8021X_EAPOL */
 621         INT(mode);
 622         INT(proactive_key_caching);
 623         INT(disabled);
 624         INT(peerkey);
 625 #ifdef CONFIG_IEEE80211W
 626         INT(ieee80211w);
 627 #endif /* CONFIG_IEEE80211W */
 628         STR(id_str);
 629
 630 #undef STR
 631 #undef INT
 632 #undef INT_DEF
 633 }
 634
 635
 636 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 637 {
 638         unsigned char *encoded;
 639
 640         encoded = base64_encode(blob->data, blob->len, NULL);
 641         if (encoded == NULL)
 642                 return -1;
 643
 644         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 645         os_free(encoded);
 646         return 0;
 647 }
 648
 649
 650 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 651 {
 652 #ifdef CONFIG_CTRL_IFACE
 653         if (config->ctrl_interface)
 654                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 655         if (config->ctrl_interface_group)
 656                 fprintf(f, "ctrl_interface_group=%s\n",
 657                         config->ctrl_interface_group);
 658 #endif /* CONFIG_CTRL_IFACE */
 659         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 660                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 661         if (config->ap_scan != DEFAULT_AP_SCAN)
 662                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 663         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 664                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 665         if (config->opensc_engine_path)
 666                 fprintf(f, "opensc_engine_path=%s\n",
 667                         config->opensc_engine_path);
 668         if (config->pkcs11_engine_path)
 669                 fprintf(f, "pkcs11_engine_path=%s\n",
 670                         config->pkcs11_engine_path);
 671         if (config->pkcs11_module_path)
 672                 fprintf(f, "pkcs11_module_path=%s\n",
 673                         config->pkcs11_module_path);
 674         if (config->driver_param)
 675                 fprintf(f, "driver_param=%s\n", config->driver_param);
 676         if (config->dot11RSNAConfigPMKLifetime)
 677                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 678                         config->dot11RSNAConfigPMKLifetime);
 679         if (config->dot11RSNAConfigPMKReauthThreshold)
 680                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 681                         config->dot11RSNAConfigPMKReauthThreshold);
 682         if (config->dot11RSNAConfigSATimeout)
 683                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 684                         config->dot11RSNAConfigSATimeout);
 685         if (config->update_config)
 686                 fprintf(f, "update_config=%d\n", config->update_config);
 687 }
 688
 689
 690 int wpa_config_write(const char *name, struct wpa_config *config)
 691 {
 692         FILE *f;
 693         struct wpa_ssid *ssid;
 694         struct wpa_config_blob *blob;
 695         int ret = 0;
 696
 697         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 698
 699         f = fopen(name, "w");
 700         if (f == NULL) {
 701                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 702                 return -1;
 703         }
 704
 705         wpa_config_write_global(f, config);
 706
 707         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 708                 fprintf(f, "\nnetwork={\n");
 709                 wpa_config_write_network(f, ssid);
 710                 fprintf(f, "}\n");
 711         }
 712
 713         for (blob = config->blobs; blob; blob = blob->next) {
 714                 ret = wpa_config_write_blob(f, blob);
 715                 if (ret)
 716                         break;
 717         }
 718
 719         fclose(f);
 720
 721         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
 722                    name, ret ? "un" : "");
 723         return ret;
 724 }