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      1 /*
      2  * WPA Supplicant / Configuration backend: text file
      3  * Copyright (c) 2003-2008, Jouni Malinen <j (at) 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 }
    788