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 (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !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 #ifndef CONFIG_NO_CONFIG_BLOBS
 188 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 189                                                      const char *name)
 190 {
 191         struct wpa_config_blob *blob;
 192         char buf[256], *pos;
 193         unsigned char *encoded = NULL, *nencoded;
 194         int end = 0;
 195         size_t encoded_len = 0, len;
 196
 197         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 198                    *line, name);
 199
 200         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 201                 if (os_strcmp(pos, "}") == 0) {
 202                         end = 1;
 203                         break;
 204                 }
 205
 206                 len = os_strlen(pos);
 207                 nencoded = os_realloc(encoded, encoded_len + len);
 208                 if (nencoded == NULL) {
 209                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 210                                    "blob", *line);
 211                         os_free(encoded);
 212                         return NULL;
 213                 }
 214                 encoded = nencoded;
 215                 os_memcpy(encoded + encoded_len, pos, len);
 216                 encoded_len += len;
 217         }
 218
 219         if (!end) {
 220                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 221                            "properly", *line);
 222                 os_free(encoded);
 223                 return NULL;
 224         }
 225
 226         blob = os_zalloc(sizeof(*blob));
 227         if (blob == NULL) {
 228                 os_free(encoded);
 229                 return NULL;
 230         }
 231         blob->name = os_strdup(name);
 232         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 233         os_free(encoded);
 234
 235         if (blob->name == NULL || blob->data == NULL) {
 236                 wpa_config_free_blob(blob);
 237                 return NULL;
 238         }
 239
 240         return blob;
 241 }
 242
 243
 244 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 245                                    int *line, char *bname)
 246 {
 247         char *name_end;
 248         struct wpa_config_blob *blob;
 249
 250         name_end = os_strchr(bname, '=');
 251         if (name_end == NULL) {
 252                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 253                            *line);
 254                 return -1;
 255         }
 256         *name_end = '\0';
 257
 258         blob = wpa_config_read_blob(f, line, bname);
 259         if (blob == NULL) {
 260                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 261                            *line, bname);
 262                 return -1;
 263         }
 264         wpa_config_set_blob(config, blob);
 265         return 0;
 266 }
 267 #endif /* CONFIG_NO_CONFIG_BLOBS */
 268
 269
 270 struct wpa_config * wpa_config_read(const char *name)
 271 {
 272         FILE *f;
 273         char buf[256], *pos;
 274         int errors = 0, line = 0;
 275         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 276         struct wpa_config *config;
 277         int id = 0;
 278
 279         config = wpa_config_alloc_empty(NULL, NULL);
 280         if (config == NULL)
 281                 return NULL;
 282         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 283         f = fopen(name, "r");
 284         if (f == NULL) {
 285                 os_free(config);
 286                 return NULL;
 287         }
 288
 289         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 290                 if (os_strcmp(pos, "network={") == 0) {
 291                         ssid = wpa_config_read_network(f, &line, id++);
 292                         if (ssid == NULL) {
 293                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 294                                            "parse network block.", line);
 295                                 errors++;
 296                                 continue;
 297                         }
 298                         if (head == NULL) {
 299                                 head = tail = ssid;
 300                         } else {
 301                                 tail->next = ssid;
 302                                 tail = ssid;
 303                         }
 304                         if (wpa_config_add_prio_network(config, ssid)) {
 305                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 306                                            "network block to priority list.",
 307                                            line);
 308                                 errors++;
 309                                 continue;
 310                         }
 311 #ifndef CONFIG_NO_CONFIG_BLOBS
 312                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 313                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 314                             < 0) {
 315                                 errors++;
 316                                 continue;
 317                         }
 318 #endif /* CONFIG_NO_CONFIG_BLOBS */
 319                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 320                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 321                                    "line '%s'.", line, pos);
 322                         errors++;
 323                         continue;
 324                 }
 325         }
 326
 327         fclose(f);
 328
 329         config->ssid = head;
 330         wpa_config_debug_dump_networks(config);
 331
 332 #ifndef WPA_IGNORE_CONFIG_ERRORS
 333         if (errors) {
 334                 wpa_config_free(config);
 335                 config = NULL;
 336                 head = NULL;
 337         }
 338 #endif /* WPA_IGNORE_CONFIG_ERRORS */
 339
 340         return config;
 341 }
 342
 343
 344 #ifndef CONFIG_NO_CONFIG_WRITE
 345
 346 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 347 {
 348         char *value = wpa_config_get(ssid, field);
 349         if (value == NULL)
 350                 return;
 351         fprintf(f, "\t%s=%s\n", field, value);
 352         os_free(value);
 353 }
 354
 355
 356 static void write_int(FILE *f, const char *field, int value, int def)
 357 {
 358         if (value == def)
 359                 return;
 360         fprintf(f, "\t%s=%d\n", field, value);
 361 }
 362
 363
 364 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 365 {
 366         char *value = wpa_config_get(ssid, "bssid");
 367         if (value == NULL)
 368                 return;
 369         fprintf(f, "\tbssid=%s\n", value);
 370         os_free(value);
 371 }
 372
 373
 374 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 375 {
 376         char *value = wpa_config_get(ssid, "psk");
 377         if (value == NULL)
 378                 return;
 379         fprintf(f, "\tpsk=%s\n", value);
 380         os_free(value);
 381 }
 382
 383
 384 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 385 {
 386         char *value;
 387
 388         if (ssid->proto == DEFAULT_PROTO)
 389                 return;
 390
 391         value = wpa_config_get(ssid, "proto");
 392         if (value == NULL)
 393                 return;
 394         if (value[0])
 395                 fprintf(f, "\tproto=%s\n", value);
 396         os_free(value);
 397 }
 398
 399
 400 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 401 {
 402         char *value;
 403
 404         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 405                 return;
 406
 407         value = wpa_config_get(ssid, "key_mgmt");
 408         if (value == NULL)
 409                 return;
 410         if (value[0])
 411                 fprintf(f, "\tkey_mgmt=%s\n", value);
 412         os_free(value);
 413 }
 414
 415
 416 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 417 {
 418         char *value;
 419
 420         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 421                 return;
 422
 423         value = wpa_config_get(ssid, "pairwise");
 424         if (value == NULL)
 425                 return;
 426         if (value[0])
 427                 fprintf(f, "\tpairwise=%s\n", value);
 428         os_free(value);
 429 }
 430
 431
 432 static void write_group(FILE *f, struct wpa_ssid *ssid)
 433 {
 434         char *value;
 435
 436         if (ssid->group_cipher == DEFAULT_GROUP)
 437                 return;
 438
 439         value = wpa_config_get(ssid, "group");
 440         if (value == NULL)
 441                 return;
 442         if (value[0])
 443                 fprintf(f, "\tgroup=%s\n", value);
 444         os_free(value);
 445 }
 446
 447
 448 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 449 {
 450         char *value;
 451
 452         if (ssid->auth_alg == 0)
 453                 return;
 454
 455         value = wpa_config_get(ssid, "auth_alg");
 456         if (value == NULL)
 457                 return;
 458         if (value[0])
 459                 fprintf(f, "\tauth_alg=%s\n", value);
 460         os_free(value);
 461 }
 462
 463
 464 #ifdef IEEE8021X_EAPOL
 465 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 466 {
 467         char *value;
 468
 469         value = wpa_config_get(ssid, "eap");
 470         if (value == NULL)
 471                 return;
 472
 473         if (value[0])
 474                 fprintf(f, "\teap=%s\n", value);
 475         os_free(value);
 476 }
 477 #endif /* IEEE8021X_EAPOL */
 478
 479
 480 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 481 {
 482         char field[20], *value;
 483         int res;
 484
 485         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 486         if (res < 0 || (size_t) res >= sizeof(field))
 487                 return;
 488         value = wpa_config_get(ssid, field);
 489         if (value) {
 490                 fprintf(f, "\t%s=%s\n", field, value);
 491                 os_free(value);
 492         }
 493 }
 494
 495
 496 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 497 {
 498         int i;
 499
 500 #define STR(t) write_str(f, #t, ssid)
 501 #define INT(t) write_int(f, #t, ssid->t, 0)
 502 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 503 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 504 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 505
 506         STR(ssid);
 507         INT(scan_ssid);
 508         write_bssid(f, ssid);
 509         write_psk(f, ssid);
 510         write_proto(f, ssid);
 511         write_key_mgmt(f, ssid);
 512         write_pairwise(f, ssid);
 513         write_group(f, ssid);
 514         write_auth_alg(f, ssid);
 515 #ifdef IEEE8021X_EAPOL
 516         write_eap(f, ssid);
 517         STR(identity);
 518         STR(anonymous_identity);
 519         STR(password);
 520         STR(ca_cert);
 521         STR(ca_path);
 522         STR(client_cert);
 523         STR(private_key);
 524         STR(private_key_passwd);
 525         STR(dh_file);
 526         STR(subject_match);
 527         STR(altsubject_match);
 528         STR(ca_cert2);
 529         STR(ca_path2);
 530         STR(client_cert2);
 531         STR(private_key2);
 532         STR(private_key2_passwd);
 533         STR(dh_file2);
 534         STR(subject_match2);
 535         STR(altsubject_match2);
 536         STR(phase1);
 537         STR(phase2);
 538         STR(pcsc);
 539         STR(pin);
 540         STR(engine_id);
 541         STR(key_id);
 542         STR(cert_id);
 543         STR(ca_cert_id);
 544         STR(key2_id);
 545         STR(pin2);
 546         STR(engine2_id);
 547         STR(cert2_id);
 548         STR(ca_cert2_id);
 549         INTe(engine);
 550         INTe(engine2);
 551         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 552 #endif /* IEEE8021X_EAPOL */
 553         for (i = 0; i < 4; i++)
 554                 write_wep_key(f, i, ssid);
 555         INT(wep_tx_keyidx);
 556         INT(priority);
 557 #ifdef IEEE8021X_EAPOL
 558         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 559         STR(pac_file);
 560         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 561 #endif /* IEEE8021X_EAPOL */
 562         INT(mode);
 563         INT(proactive_key_caching);
 564         INT(disabled);
 565         INT(peerkey);
 566 #ifdef CONFIG_IEEE80211W
 567         INT(ieee80211w);
 568 #endif /* CONFIG_IEEE80211W */
 569         STR(id_str);
 570
 571 #undef STR
 572 #undef INT
 573 #undef INT_DEF
 574 }
 575
 576
 577 #ifndef CONFIG_NO_CONFIG_BLOBS
 578 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 579 {
 580         unsigned char *encoded;
 581
 582         encoded = base64_encode(blob->data, blob->len, NULL);
 583         if (encoded == NULL)
 584                 return -1;
 585
 586         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 587         os_free(encoded);
 588         return 0;
 589 }
 590 #endif /* CONFIG_NO_CONFIG_BLOBS */
 591
 592
 593 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 594 {
 595 #ifdef CONFIG_CTRL_IFACE
 596         if (config->ctrl_interface)
 597                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 598         if (config->ctrl_interface_group)
 599                 fprintf(f, "ctrl_interface_group=%s\n",
 600                         config->ctrl_interface_group);
 601 #endif /* CONFIG_CTRL_IFACE */
 602         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 603                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 604         if (config->ap_scan != DEFAULT_AP_SCAN)
 605                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 606         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 607                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 608         if (config->opensc_engine_path)
 609                 fprintf(f, "opensc_engine_path=%s\n",
 610                         config->opensc_engine_path);
 611         if (config->pkcs11_engine_path)
 612                 fprintf(f, "pkcs11_engine_path=%s\n",
 613                         config->pkcs11_engine_path);
 614         if (config->pkcs11_module_path)
 615                 fprintf(f, "pkcs11_module_path=%s\n",
 616                         config->pkcs11_module_path);
 617         if (config->driver_param)
 618                 fprintf(f, "driver_param=%s\n", config->driver_param);
 619         if (config->dot11RSNAConfigPMKLifetime)
 620                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 621                         config->dot11RSNAConfigPMKLifetime);
 622         if (config->dot11RSNAConfigPMKReauthThreshold)
 623                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 624                         config->dot11RSNAConfigPMKReauthThreshold);
 625         if (config->dot11RSNAConfigSATimeout)
 626                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 627                         config->dot11RSNAConfigSATimeout);
 628         if (config->update_config)
 629                 fprintf(f, "update_config=%d\n", config->update_config);
 630 #ifdef CONFIG_WPS
 631         if (!is_nil_uuid(config->uuid)) {
 632                 char buf[40];
 633                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 634                 fprintf(f, "uuid=%s\n", buf);
 635         }
 636         if (config->device_name)
 637                 fprintf(f, "device_name=%s\n", config->device_name);
 638         if (config->manufacturer)
 639                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 640         if (config->model_name)
 641                 fprintf(f, "model_name=%s\n", config->model_name);
 642         if (config->model_number)
 643                 fprintf(f, "model_number=%s\n", config->model_number);
 644         if (config->serial_number)
 645                 fprintf(f, "serial_number=%s\n", config->serial_number);
 646         {
 647                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 648                 buf = wps_dev_type_bin2str(config->device_type,
 649                                            _buf, sizeof(_buf));
 650                 if (os_strcmp(buf, "0-00000000-0") != 0)
 651                         fprintf(f, "device_type=%s\n", buf);
 652         }
 653         if (WPA_GET_BE32(config->os_version))
 654                 fprintf(f, "os_version=%08x\n",
 655                         WPA_GET_BE32(config->os_version));
 656         if (config->config_methods)
 657                 fprintf(f, "config_methods=%s\n", config->config_methods);
 658         if (config->wps_cred_processing)
 659                 fprintf(f, "wps_cred_processing=%d\n",
 660                         config->wps_cred_processing);
 661 #endif /* CONFIG_WPS */
 662 #ifdef CONFIG_P2P
 663         if (config->p2p_listen_reg_class)
 664                 fprintf(f, "p2p_listen_reg_class=%u\n",
 665                         config->p2p_listen_reg_class);
 666         if (config->p2p_listen_channel)
 667                 fprintf(f, "p2p_listen_channel=%u\n",
 668                         config->p2p_listen_channel);
 669         if (config->p2p_oper_reg_class)
 670                 fprintf(f, "p2p_oper_reg_class=%u\n",
 671                         config->p2p_oper_reg_class);
 672         if (config->p2p_oper_channel)
 673                 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
 674         if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
 675                 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
 676         if (config->p2p_ssid_postfix)
 677                 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
 678         if (config->persistent_reconnect)
 679                 fprintf(f, "persistent_reconnect=%u\n",
 680                         config->persistent_reconnect);
 681         if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
 682                 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
 683         if (config->p2p_group_idle)
 684                 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
 685 #endif /* CONFIG_P2P */
 686         if (config->country[0] && config->country[1]) {
 687                 fprintf(f, "country=%c%c\n",
 688                         config->country[0], config->country[1]);
 689         }
 690         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
 691                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
 692         if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
 693                 fprintf(f, "bss_expiration_age=%u\n",
 694                         config->bss_expiration_age);
 695         if (config->bss_expiration_scan_count !=
 696             DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
 697                 fprintf(f, "bss_expiration_scan_count=%u\n",
 698                         config->bss_expiration_scan_count);
 699         if (config->filter_ssids)
 700                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
 701         if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
 702                 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
 703         if (config->disassoc_low_ack)
 704                 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
 705 #ifdef CONFIG_INTERWORKING
 706         if (config->home_realm)
 707                 fprintf(f, "home_realm=%s\n", config->home_realm);
 708         if (config->home_username)
 709                 fprintf(f, "home_username=%s\n", config->home_username);
 710         if (config->home_password)
 711                 fprintf(f, "home_password=%s\n", config->home_password);
 712         if (config->home_ca_cert)
 713                 fprintf(f, "home_ca_cert=%s\n", config->home_ca_cert);
 714         if (config->home_imsi)
 715                 fprintf(f, "home_imsi=%s\n", config->home_imsi);
 716         if (config->home_milenage)
 717                 fprintf(f, "home_milenage=%s\n", config->home_milenage);
 718         if (config->interworking)
 719                 fprintf(f, "interworking=%u\n", config->interworking);
 720         if (!is_zero_ether_addr(config->hessid))
 721                 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
 722         if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
 723                 fprintf(f, "access_network_type=%d\n",
 724                         config->access_network_type);
 725 #endif /* CONFIG_INTERWORKING */
 726 }
 727
 728 #endif /* CONFIG_NO_CONFIG_WRITE */
 729
 730
 731 int wpa_config_write(const char *name, struct wpa_config *config)
 732 {
 733 #ifndef CONFIG_NO_CONFIG_WRITE
 734         FILE *f;
 735         struct wpa_ssid *ssid;
 736 #ifndef CONFIG_NO_CONFIG_BLOBS
 737         struct wpa_config_blob *blob;
 738 #endif /* CONFIG_NO_CONFIG_BLOBS */
 739         int ret = 0;
 740
 741         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 742
 743         f = fopen(name, "w");
 744         if (f == NULL) {
 745                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 746                 return -1;
 747         }
 748
 749         wpa_config_write_global(f, config);
 750
 751         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 752                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
 753                         continue; /* do not save temporary networks */
 754                 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
 755                     !ssid->passphrase)
 756                         continue; /* do not save invalid network */
 757                 fprintf(f, "\nnetwork={\n");
 758                 wpa_config_write_network(f, ssid);
 759                 fprintf(f, "}\n");
 760         }
 761
 762 #ifndef CONFIG_NO_CONFIG_BLOBS
 763         for (blob = config->blobs; blob; blob = blob->next) {
 764                 ret = wpa_config_write_blob(f, blob);
 765                 if (ret)
 766                         break;
 767         }
 768 #endif /* CONFIG_NO_CONFIG_BLOBS */
 769
 770         fclose(f);
 771
 772         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
 773                    name, ret ? "un" : "");
 774         return ret;
 775 #else /* CONFIG_NO_CONFIG_WRITE */
 776         return -1;
 777 #endif /* CONFIG_NO_CONFIG_WRITE */
 778 }