wpa_supplicant/config_file.c

   1 /*
   2  * WPA Supplicant / Configuration backend: text file
   3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  *
   8  * This file implements a configuration backend for text files. All the
   9  * configuration information is stored in a text file that uses a format
  10  * described in the sample configuration file, wpa_supplicant.conf.
  11  */
  12
  13 #include "includes.h"
  14
  15 #include "common.h"
  16 #include "config.h"
  17 #include "base64.h"
  18 #include "uuid.h"
  19
  20
  21 /**
  22  * wpa_config_get_line - Read the next configuration file line
  23  * @s: Buffer for the line
  24  * @size: The buffer length
  25  * @stream: File stream to read from
  26  * @line: Pointer to a variable storing the file line number
  27  * @_pos: Buffer for the pointer to the beginning of data on the text line or
  28  * %NULL if not needed (returned value used instead)
  29  * Returns: Pointer to the beginning of data on the text line or %NULL if no
  30  * more text lines are available.
  31  *
  32  * This function reads the next non-empty line from the configuration file and
  33  * removes comments. The returned string is guaranteed to be null-terminated.
  34  */
  35 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
  36                                   char **_pos)
  37 {
  38         char *pos, *end, *sstart;
  39
  40         while (fgets(s, size, stream)) {
  41                 (*line)++;
  42                 s[size - 1] = '\0';
  43                 pos = s;
  44
  45                 /* Skip white space from the beginning of line. */
  46                 while (*pos == ' ' || *pos == '\t' || *pos == '\r')
  47                         pos++;
  48
  49                 /* Skip comment lines and empty lines */
  50                 if (*pos == '#' || *pos == '\n' || *pos == '\0')
  51                         continue;
  52
  53                 /*
  54                  * Remove # comments unless they are within a double quoted
  55                  * string.
  56                  */
  57                 sstart = os_strchr(pos, '"');
  58                 if (sstart)
  59                         sstart = os_strrchr(sstart + 1, '"');
  60                 if (!sstart)
  61                         sstart = pos;
  62                 end = os_strchr(sstart, '#');
  63                 if (end)
  64                         *end-- = '\0';
  65                 else
  66                         end = pos + os_strlen(pos) - 1;
  67
  68                 /* Remove trailing white space. */
  69                 while (end > pos &&
  70                        (*end == '\n' || *end == ' ' || *end == '\t' ||
  71                         *end == '\r'))
  72                         *end-- = '\0';
  73
  74                 if (*pos == '\0')
  75                         continue;
  76
  77                 if (_pos)
  78                         *_pos = pos;
  79                 return pos;
  80         }
  81
  82         if (_pos)
  83                 *_pos = NULL;
  84         return NULL;
  85 }
  86
  87
  88 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
  89 {
  90         int errors = 0;
  91
  92         if (ssid->passphrase) {
  93                 if (ssid->psk_set) {
  94                         wpa_printf(MSG_ERROR, "Line %d: both PSK and "
  95                                    "passphrase configured.", line);
  96                         errors++;
  97                 }
  98                 wpa_config_update_psk(ssid);
  99         }
 100
 101         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set) {
 102                 wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
 103                            "management, but no PSK configured.", line);
 104                 errors++;
 105         }
 106
 107         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 108             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 109             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 110                 /* Group cipher cannot be stronger than the pairwise cipher. */
 111                 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
 112                            " list since it was not allowed for pairwise "
 113                            "cipher", line);
 114                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 115         }
 116
 117         return errors;
 118 }
 119
 120
 121 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
 122 {
 123         struct wpa_ssid *ssid;
 124         int errors = 0, end = 0;
 125         char buf[256], *pos, *pos2;
 126
 127         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
 128                    *line);
 129         ssid = os_zalloc(sizeof(*ssid));
 130         if (ssid == NULL)
 131                 return NULL;
 132         ssid->id = id;
 133
 134         wpa_config_set_network_defaults(ssid);
 135
 136         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 137                 if (os_strcmp(pos, "}") == 0) {
 138                         end = 1;
 139                         break;
 140                 }
 141
 142                 pos2 = os_strchr(pos, '=');
 143                 if (pos2 == NULL) {
 144                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 145                                    "'%s'.", *line, pos);
 146                         errors++;
 147                         continue;
 148                 }
 149
 150                 *pos2++ = '\0';
 151                 if (*pos2 == '"') {
 152                         if (os_strchr(pos2 + 1, '"') == NULL) {
 153                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 154                                            "quotation '%s'.", *line, pos2);
 155                                 errors++;
 156                                 continue;
 157                         }
 158                 }
 159
 160                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 161                         errors++;
 162         }
 163
 164         if (!end) {
 165                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 166                            "terminated properly.", *line);
 167                 errors++;
 168         }
 169
 170         errors += wpa_config_validate_network(ssid, *line);
 171
 172         if (errors) {
 173                 wpa_config_free_ssid(ssid);
 174                 ssid = NULL;
 175         }
 176
 177         return ssid;
 178 }
 179
 180
 181 #ifndef CONFIG_NO_CONFIG_BLOBS
 182 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 183                                                      const char *name)
 184 {
 185         struct wpa_config_blob *blob;
 186         char buf[256], *pos;
 187         unsigned char *encoded = NULL, *nencoded;
 188         int end = 0;
 189         size_t encoded_len = 0, len;
 190
 191         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 192                    *line, name);
 193
 194         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 195                 if (os_strcmp(pos, "}") == 0) {
 196                         end = 1;
 197                         break;
 198                 }
 199
 200                 len = os_strlen(pos);
 201                 nencoded = os_realloc(encoded, encoded_len + len);
 202                 if (nencoded == NULL) {
 203                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 204                                    "blob", *line);
 205                         os_free(encoded);
 206                         return NULL;
 207                 }
 208                 encoded = nencoded;
 209                 os_memcpy(encoded + encoded_len, pos, len);
 210                 encoded_len += len;
 211         }
 212
 213         if (!end) {
 214                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 215                            "properly", *line);
 216                 os_free(encoded);
 217                 return NULL;
 218         }
 219
 220         blob = os_zalloc(sizeof(*blob));
 221         if (blob == NULL) {
 222                 os_free(encoded);
 223                 return NULL;
 224         }
 225         blob->name = os_strdup(name);
 226         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 227         os_free(encoded);
 228
 229         if (blob->name == NULL || blob->data == NULL) {
 230                 wpa_config_free_blob(blob);
 231                 return NULL;
 232         }
 233
 234         return blob;
 235 }
 236
 237
 238 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 239                                    int *line, char *bname)
 240 {
 241         char *name_end;
 242         struct wpa_config_blob *blob;
 243
 244         name_end = os_strchr(bname, '=');
 245         if (name_end == NULL) {
 246                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 247                            *line);
 248                 return -1;
 249         }
 250         *name_end = '\0';
 251
 252         blob = wpa_config_read_blob(f, line, bname);
 253         if (blob == NULL) {
 254                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 255                            *line, bname);
 256                 return -1;
 257         }
 258         wpa_config_set_blob(config, blob);
 259         return 0;
 260 }
 261 #endif /* CONFIG_NO_CONFIG_BLOBS */
 262
 263
 264 struct wpa_config * wpa_config_read(const char *name)
 265 {
 266         FILE *f;
 267         char buf[256], *pos;
 268         int errors = 0, line = 0;
 269         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 270         struct wpa_config *config;
 271         int id = 0;
 272
 273         config = wpa_config_alloc_empty(NULL, NULL);
 274         if (config == NULL)
 275                 return NULL;
 276         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 277         f = fopen(name, "r");
 278         if (f == NULL) {
 279                 os_free(config);
 280                 return NULL;
 281         }
 282
 283         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 284                 if (os_strcmp(pos, "network={") == 0) {
 285                         ssid = wpa_config_read_network(f, &line, id++);
 286                         if (ssid == NULL) {
 287                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 288                                            "parse network block.", line);
 289                                 errors++;
 290                                 continue;
 291                         }
 292                         if (head == NULL) {
 293                                 head = tail = ssid;
 294                         } else {
 295                                 tail->next = ssid;
 296                                 tail = ssid;
 297                         }
 298                         if (wpa_config_add_prio_network(config, ssid)) {
 299                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 300                                            "network block to priority list.",
 301                                            line);
 302                                 errors++;
 303                                 continue;
 304                         }
 305 #ifndef CONFIG_NO_CONFIG_BLOBS
 306                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 307                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 308                             < 0) {
 309                                 errors++;
 310                                 continue;
 311                         }
 312 #endif /* CONFIG_NO_CONFIG_BLOBS */
 313                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 314                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 315                                    "line '%s'.", line, pos);
 316                         errors++;
 317                         continue;
 318                 }
 319         }
 320
 321         fclose(f);
 322
 323         config->ssid = head;
 324         wpa_config_debug_dump_networks(config);
 325
 326 #ifndef WPA_IGNORE_CONFIG_ERRORS
 327         if (errors) {
 328                 wpa_config_free(config);
 329                 config = NULL;
 330                 head = NULL;
 331         }
 332 #endif /* WPA_IGNORE_CONFIG_ERRORS */
 333
 334         return config;
 335 }
 336
 337
 338 #ifndef CONFIG_NO_CONFIG_WRITE
 339
 340 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 341 {
 342         char *value = wpa_config_get(ssid, field);
 343         if (value == NULL)
 344                 return;
 345         fprintf(f, "\t%s=%s\n", field, value);
 346         os_free(value);
 347 }
 348
 349
 350 static void write_int(FILE *f, const char *field, int value, int def)
 351 {
 352         if (value == def)
 353                 return;
 354         fprintf(f, "\t%s=%d\n", field, value);
 355 }
 356
 357
 358 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 359 {
 360         char *value = wpa_config_get(ssid, "bssid");
 361         if (value == NULL)
 362                 return;
 363         fprintf(f, "\tbssid=%s\n", value);
 364         os_free(value);
 365 }
 366
 367
 368 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 369 {
 370         char *value = wpa_config_get(ssid, "psk");
 371         if (value == NULL)
 372                 return;
 373         fprintf(f, "\tpsk=%s\n", value);
 374         os_free(value);
 375 }
 376
 377
 378 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 379 {
 380         char *value;
 381
 382         if (ssid->proto == DEFAULT_PROTO)
 383                 return;
 384
 385         value = wpa_config_get(ssid, "proto");
 386         if (value == NULL)
 387                 return;
 388         if (value[0])
 389                 fprintf(f, "\tproto=%s\n", value);
 390         os_free(value);
 391 }
 392
 393
 394 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 395 {
 396         char *value;
 397
 398         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 399                 return;
 400
 401         value = wpa_config_get(ssid, "key_mgmt");
 402         if (value == NULL)
 403                 return;
 404         if (value[0])
 405                 fprintf(f, "\tkey_mgmt=%s\n", value);
 406         os_free(value);
 407 }
 408
 409
 410 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 411 {
 412         char *value;
 413
 414         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 415                 return;
 416
 417         value = wpa_config_get(ssid, "pairwise");
 418         if (value == NULL)
 419                 return;
 420         if (value[0])
 421                 fprintf(f, "\tpairwise=%s\n", value);
 422         os_free(value);
 423 }
 424
 425
 426 static void write_group(FILE *f, struct wpa_ssid *ssid)
 427 {
 428         char *value;
 429
 430         if (ssid->group_cipher == DEFAULT_GROUP)
 431                 return;
 432
 433         value = wpa_config_get(ssid, "group");
 434         if (value == NULL)
 435                 return;
 436         if (value[0])
 437                 fprintf(f, "\tgroup=%s\n", value);
 438         os_free(value);
 439 }
 440
 441
 442 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 443 {
 444         char *value;
 445
 446         if (ssid->auth_alg == 0)
 447                 return;
 448
 449         value = wpa_config_get(ssid, "auth_alg");
 450         if (value == NULL)
 451                 return;
 452         if (value[0])
 453                 fprintf(f, "\tauth_alg=%s\n", value);
 454         os_free(value);
 455 }
 456
 457
 458 #ifdef IEEE8021X_EAPOL
 459 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 460 {
 461         char *value;
 462
 463         value = wpa_config_get(ssid, "eap");
 464         if (value == NULL)
 465                 return;
 466
 467         if (value[0])
 468                 fprintf(f, "\teap=%s\n", value);
 469         os_free(value);
 470 }
 471 #endif /* IEEE8021X_EAPOL */
 472
 473
 474 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 475 {
 476         char field[20], *value;
 477         int res;
 478
 479         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 480         if (res < 0 || (size_t) res >= sizeof(field))
 481                 return;
 482         value = wpa_config_get(ssid, field);
 483         if (value) {
 484                 fprintf(f, "\t%s=%s\n", field, value);
 485                 os_free(value);
 486         }
 487 }
 488
 489
 490 #ifdef CONFIG_P2P
 491 static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
 492 {
 493         char *value = wpa_config_get(ssid, "p2p_client_list");
 494         if (value == NULL)
 495                 return;
 496         fprintf(f, "\tp2p_client_list=%s\n", value);
 497         os_free(value);
 498 }
 499 #endif /* CONFIG_P2P */
 500
 501
 502 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 503 {
 504         int i;
 505
 506 #define STR(t) write_str(f, #t, ssid)
 507 #define INT(t) write_int(f, #t, ssid->t, 0)
 508 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 509 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 510 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 511
 512         STR(ssid);
 513         INT(scan_ssid);
 514         write_bssid(f, ssid);
 515         write_psk(f, ssid);
 516         write_proto(f, ssid);
 517         write_key_mgmt(f, ssid);
 518         write_pairwise(f, ssid);
 519         write_group(f, ssid);
 520         write_auth_alg(f, ssid);
 521 #ifdef IEEE8021X_EAPOL
 522         write_eap(f, ssid);
 523         STR(identity);
 524         STR(anonymous_identity);
 525         STR(password);
 526         STR(ca_cert);
 527         STR(ca_path);
 528         STR(client_cert);
 529         STR(private_key);
 530         STR(private_key_passwd);
 531         STR(dh_file);
 532         STR(subject_match);
 533         STR(altsubject_match);
 534         STR(ca_cert2);
 535         STR(ca_path2);
 536         STR(client_cert2);
 537         STR(private_key2);
 538         STR(private_key2_passwd);
 539         STR(dh_file2);
 540         STR(subject_match2);
 541         STR(altsubject_match2);
 542         STR(phase1);
 543         STR(phase2);
 544         STR(pcsc);
 545         STR(pin);
 546         STR(engine_id);
 547         STR(key_id);
 548         STR(cert_id);
 549         STR(ca_cert_id);
 550         STR(key2_id);
 551         STR(pin2);
 552         STR(engine2_id);
 553         STR(cert2_id);
 554         STR(ca_cert2_id);
 555         INTe(engine);
 556         INTe(engine2);
 557         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 558 #endif /* IEEE8021X_EAPOL */
 559         for (i = 0; i < 4; i++)
 560                 write_wep_key(f, i, ssid);
 561         INT(wep_tx_keyidx);
 562         INT(priority);
 563 #ifdef IEEE8021X_EAPOL
 564         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 565         STR(pac_file);
 566         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 567 #endif /* IEEE8021X_EAPOL */
 568         INT(mode);
 569         INT(proactive_key_caching);
 570         INT(disabled);
 571         INT(peerkey);
 572 #ifdef CONFIG_IEEE80211W
 573         INT(ieee80211w);
 574 #endif /* CONFIG_IEEE80211W */
 575         STR(id_str);
 576 #ifdef CONFIG_P2P
 577         write_p2p_client_list(f, ssid);
 578 #endif /* CONFIG_P2P */
 579
 580 #undef STR
 581 #undef INT
 582 #undef INT_DEF
 583 }
 584
 585
 586 #ifndef CONFIG_NO_CONFIG_BLOBS
 587 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 588 {
 589         unsigned char *encoded;
 590
 591         encoded = base64_encode(blob->data, blob->len, NULL);
 592         if (encoded == NULL)
 593                 return -1;
 594
 595         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 596         os_free(encoded);
 597         return 0;
 598 }
 599 #endif /* CONFIG_NO_CONFIG_BLOBS */
 600
 601
 602 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 603 {
 604 #ifdef CONFIG_CTRL_IFACE
 605         if (config->ctrl_interface)
 606                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 607         if (config->ctrl_interface_group)
 608                 fprintf(f, "ctrl_interface_group=%s\n",
 609                         config->ctrl_interface_group);
 610 #endif /* CONFIG_CTRL_IFACE */
 611         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 612                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 613         if (config->ap_scan != DEFAULT_AP_SCAN)
 614                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 615         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 616                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 617         if (config->opensc_engine_path)
 618                 fprintf(f, "opensc_engine_path=%s\n",
 619                         config->opensc_engine_path);
 620         if (config->pkcs11_engine_path)
 621                 fprintf(f, "pkcs11_engine_path=%s\n",
 622                         config->pkcs11_engine_path);
 623         if (config->pkcs11_module_path)
 624                 fprintf(f, "pkcs11_module_path=%s\n",
 625                         config->pkcs11_module_path);
 626         if (config->driver_param)
 627                 fprintf(f, "driver_param=%s\n", config->driver_param);
 628         if (config->dot11RSNAConfigPMKLifetime)
 629                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 630                         config->dot11RSNAConfigPMKLifetime);
 631         if (config->dot11RSNAConfigPMKReauthThreshold)
 632                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 633                         config->dot11RSNAConfigPMKReauthThreshold);
 634         if (config->dot11RSNAConfigSATimeout)
 635                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 636                         config->dot11RSNAConfigSATimeout);
 637         if (config->update_config)
 638                 fprintf(f, "update_config=%d\n", config->update_config);
 639 #ifdef CONFIG_WPS
 640         if (!is_nil_uuid(config->uuid)) {
 641                 char buf[40];
 642                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 643                 fprintf(f, "uuid=%s\n", buf);
 644         }
 645         if (config->device_name)
 646                 fprintf(f, "device_name=%s\n", config->device_name);
 647         if (config->manufacturer)
 648                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 649         if (config->model_name)
 650                 fprintf(f, "model_name=%s\n", config->model_name);
 651         if (config->model_number)
 652                 fprintf(f, "model_number=%s\n", config->model_number);
 653         if (config->serial_number)
 654                 fprintf(f, "serial_number=%s\n", config->serial_number);
 655         {
 656                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 657                 buf = wps_dev_type_bin2str(config->device_type,
 658                                            _buf, sizeof(_buf));
 659                 if (os_strcmp(buf, "0-00000000-0") != 0)
 660                         fprintf(f, "device_type=%s\n", buf);
 661         }
 662         if (WPA_GET_BE32(config->os_version))
 663                 fprintf(f, "os_version=%08x\n",
 664                         WPA_GET_BE32(config->os_version));
 665         if (config->config_methods)
 666                 fprintf(f, "config_methods=%s\n", config->config_methods);
 667         if (config->wps_cred_processing)
 668                 fprintf(f, "wps_cred_processing=%d\n",
 669                         config->wps_cred_processing);
 670 #endif /* CONFIG_WPS */
 671 #ifdef CONFIG_P2P
 672         if (config->p2p_listen_reg_class)
 673                 fprintf(f, "p2p_listen_reg_class=%u\n",
 674                         config->p2p_listen_reg_class);
 675         if (config->p2p_listen_channel)
 676                 fprintf(f, "p2p_listen_channel=%u\n",
 677                         config->p2p_listen_channel);
 678         if (config->p2p_oper_reg_class)
 679                 fprintf(f, "p2p_oper_reg_class=%u\n",
 680                         config->p2p_oper_reg_class);
 681         if (config->p2p_oper_channel)
 682                 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
 683         if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
 684                 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
 685         if (config->p2p_ssid_postfix)
 686                 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
 687         if (config->persistent_reconnect)
 688                 fprintf(f, "persistent_reconnect=%u\n",
 689                         config->persistent_reconnect);
 690         if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
 691                 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
 692         if (config->p2p_group_idle)
 693                 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
 694 #endif /* CONFIG_P2P */
 695         if (config->country[0] && config->country[1]) {
 696                 fprintf(f, "country=%c%c\n",
 697                         config->country[0], config->country[1]);
 698         }
 699         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
 700                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
 701         if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
 702                 fprintf(f, "bss_expiration_age=%u\n",
 703                         config->bss_expiration_age);
 704         if (config->bss_expiration_scan_count !=
 705             DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
 706                 fprintf(f, "bss_expiration_scan_count=%u\n",
 707                         config->bss_expiration_scan_count);
 708         if (config->filter_ssids)
 709                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
 710         if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
 711                 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
 712         if (config->disassoc_low_ack)
 713                 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
 714 #ifdef CONFIG_INTERWORKING
 715         if (config->home_realm)
 716                 fprintf(f, "home_realm=%s\n", config->home_realm);
 717         if (config->home_username)
 718                 fprintf(f, "home_username=%s\n", config->home_username);
 719         if (config->home_password)
 720                 fprintf(f, "home_password=%s\n", config->home_password);
 721         if (config->home_ca_cert)
 722                 fprintf(f, "home_ca_cert=%s\n", config->home_ca_cert);
 723         if (config->home_imsi)
 724                 fprintf(f, "home_imsi=%s\n", config->home_imsi);
 725         if (config->home_milenage)
 726                 fprintf(f, "home_milenage=%s\n", config->home_milenage);
 727         if (config->interworking)
 728                 fprintf(f, "interworking=%u\n", config->interworking);
 729         if (!is_zero_ether_addr(config->hessid))
 730                 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
 731         if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
 732                 fprintf(f, "access_network_type=%d\n",
 733                         config->access_network_type);
 734 #endif /* CONFIG_INTERWORKING */
 735 }
 736
 737 #endif /* CONFIG_NO_CONFIG_WRITE */
 738
 739
 740 int wpa_config_write(const char *name, struct wpa_config *config)
 741 {
 742 #ifndef CONFIG_NO_CONFIG_WRITE
 743         FILE *f;
 744         struct wpa_ssid *ssid;
 745 #ifndef CONFIG_NO_CONFIG_BLOBS
 746         struct wpa_config_blob *blob;
 747 #endif /* CONFIG_NO_CONFIG_BLOBS */
 748         int ret = 0;
 749
 750         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 751
 752         f = fopen(name, "w");
 753         if (f == NULL) {
 754                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 755                 return -1;
 756         }
 757
 758         wpa_config_write_global(f, config);
 759
 760         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 761                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
 762                         continue; /* do not save temporary networks */
 763                 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
 764                     !ssid->passphrase)
 765                         continue; /* do not save invalid network */
 766                 fprintf(f, "\nnetwork={\n");
 767                 wpa_config_write_network(f, ssid);
 768                 fprintf(f, "}\n");
 769         }
 770
 771 #ifndef CONFIG_NO_CONFIG_BLOBS
 772         for (blob = config->blobs; blob; blob = blob->next) {
 773                 ret = wpa_config_write_blob(f, blob);
 774                 if (ret)
 775                         break;
 776         }
 777 #endif /* CONFIG_NO_CONFIG_BLOBS */
 778
 779         fclose(f);
 780
 781         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
 782                    name, ret ? "un" : "");
 783         return ret;
 784 #else /* CONFIG_NO_CONFIG_WRITE */
 785         return -1;
 786 #endif /* CONFIG_NO_CONFIG_WRITE */
 787 }