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 */
wpa_config_get_line(char * s,int size,FILE * stream,int * line,char ** _pos)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
wpa_config_validate_network(struct wpa_ssid * ssid,int line)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 | WPA_KEY_MGMT_FT_PSK |
108 WPA_KEY_MGMT_PSK_SHA256)) &&
109 !ssid->psk_set) {
110 wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
111 "management, but no PSK configured.", line);
112 errors++;
113 }
114
115 if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
116 !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
117 !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
118 /* Group cipher cannot be stronger than the pairwise cipher. */
119 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
120 " list since it was not allowed for pairwise "
121 "cipher", line);
122 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
123 }
124
125 return errors;
126 }
127
128
wpa_config_read_network(FILE * f,int * line,int id)129 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
130 {
131 struct wpa_ssid *ssid;
132 int errors = 0, end = 0;
133 char buf[256], *pos, *pos2;
134
135 wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
136 *line);
137 ssid = os_zalloc(sizeof(*ssid));
138 if (ssid == NULL)
139 return NULL;
140 ssid->id = id;
141
142 wpa_config_set_network_defaults(ssid);
143
144 while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
145 if (os_strcmp(pos, "}") == 0) {
146 end = 1;
147 break;
148 }
149
150 pos2 = os_strchr(pos, '=');
151 if (pos2 == NULL) {
152 wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
153 "'%s'.", *line, pos);
154 errors++;
155 continue;
156 }
157
158 *pos2++ = '\0';
159 if (*pos2 == '"') {
160 if (os_strchr(pos2 + 1, '"') == NULL) {
161 wpa_printf(MSG_ERROR, "Line %d: invalid "
162 "quotation '%s'.", *line, pos2);
163 errors++;
164 continue;
165 }
166 }
167
168 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
169 errors++;
170 }
171
172 if (!end) {
173 wpa_printf(MSG_ERROR, "Line %d: network block was not "
174 "terminated properly.", *line);
175 errors++;
176 }
177
178 errors += wpa_config_validate_network(ssid, *line);
179
180 if (errors) {
181 wpa_config_free_ssid(ssid);
182 ssid = NULL;
183 }
184
185 return ssid;
186 }
187
188
189 #ifndef CONFIG_NO_CONFIG_BLOBS
wpa_config_read_blob(FILE * f,int * line,const char * name)190 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
191 const char *name)
192 {
193 struct wpa_config_blob *blob;
194 char buf[256], *pos;
195 unsigned char *encoded = NULL, *nencoded;
196 int end = 0;
197 size_t encoded_len = 0, len;
198
199 wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
200 *line, name);
201
202 while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
203 if (os_strcmp(pos, "}") == 0) {
204 end = 1;
205 break;
206 }
207
208 len = os_strlen(pos);
209 nencoded = os_realloc(encoded, encoded_len + len);
210 if (nencoded == NULL) {
211 wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
212 "blob", *line);
213 os_free(encoded);
214 return NULL;
215 }
216 encoded = nencoded;
217 os_memcpy(encoded + encoded_len, pos, len);
218 encoded_len += len;
219 }
220
221 if (!end) {
222 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
223 "properly", *line);
224 os_free(encoded);
225 return NULL;
226 }
227
228 blob = os_zalloc(sizeof(*blob));
229 if (blob == NULL) {
230 os_free(encoded);
231 return NULL;
232 }
233 blob->name = os_strdup(name);
234 blob->data = base64_decode(encoded, encoded_len, &blob->len);
235 os_free(encoded);
236
237 if (blob->name == NULL || blob->data == NULL) {
238 wpa_config_free_blob(blob);
239 return NULL;
240 }
241
242 return blob;
243 }
244
245
wpa_config_process_blob(struct wpa_config * config,FILE * f,int * line,char * bname)246 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
247 int *line, char *bname)
248 {
249 char *name_end;
250 struct wpa_config_blob *blob;
251
252 name_end = os_strchr(bname, '=');
253 if (name_end == NULL) {
254 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
255 *line);
256 return -1;
257 }
258 *name_end = '\0';
259
260 blob = wpa_config_read_blob(f, line, bname);
261 if (blob == NULL) {
262 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
263 *line, bname);
264 return -1;
265 }
266 wpa_config_set_blob(config, blob);
267 return 0;
268 }
269 #endif /* CONFIG_NO_CONFIG_BLOBS */
270
271
wpa_config_read(const char * name)272 struct wpa_config * wpa_config_read(const char *name)
273 {
274 FILE *f;
275 char buf[256], *pos;
276 int errors = 0, line = 0;
277 struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
278 struct wpa_config *config;
279 int id = 0;
280
281 config = wpa_config_alloc_empty(NULL, NULL);
282 if (config == NULL)
283 return NULL;
284 wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
285 f = fopen(name, "r");
286 if (f == NULL) {
287 os_free(config);
288 return NULL;
289 }
290
291 while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
292 if (os_strcmp(pos, "network={") == 0) {
293 ssid = wpa_config_read_network(f, &line, id++);
294 if (ssid == NULL) {
295 wpa_printf(MSG_ERROR, "Line %d: failed to "
296 "parse network block.", line);
297 errors++;
298 continue;
299 }
300 if (head == NULL) {
301 head = tail = ssid;
302 } else {
303 tail->next = ssid;
304 tail = ssid;
305 }
306 if (wpa_config_add_prio_network(config, ssid)) {
307 wpa_printf(MSG_ERROR, "Line %d: failed to add "
308 "network block to priority list.",
309 line);
310 errors++;
311 continue;
312 }
313 #ifndef CONFIG_NO_CONFIG_BLOBS
314 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
315 if (wpa_config_process_blob(config, f, &line, pos + 12)
316 < 0) {
317 errors++;
318 continue;
319 }
320 #endif /* CONFIG_NO_CONFIG_BLOBS */
321 } else if (wpa_config_process_global(config, pos, line) < 0) {
322 wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
323 "line '%s'.", line, pos);
324 errors++;
325 continue;
326 }
327 }
328
329 fclose(f);
330
331 config->ssid = head;
332 wpa_config_debug_dump_networks(config);
333
334 #ifndef WPA_IGNORE_CONFIG_ERRORS
335 if (errors) {
336 wpa_config_free(config);
337 config = NULL;
338 head = NULL;
339 }
340 #endif /* WPA_IGNORE_CONFIG_ERRORS */
341
342 return config;
343 }
344
345
346 #ifndef CONFIG_NO_CONFIG_WRITE
347
write_str(FILE * f,const char * field,struct wpa_ssid * ssid)348 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
349 {
350 char *value = wpa_config_get(ssid, field);
351 if (value == NULL)
352 return;
353 fprintf(f, "\t%s=%s\n", field, value);
354 os_free(value);
355 }
356
357
write_int(FILE * f,const char * field,int value,int def)358 static void write_int(FILE *f, const char *field, int value, int def)
359 {
360 if (value == def)
361 return;
362 fprintf(f, "\t%s=%d\n", field, value);
363 }
364
365
write_bssid(FILE * f,struct wpa_ssid * ssid)366 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
367 {
368 char *value = wpa_config_get(ssid, "bssid");
369 if (value == NULL)
370 return;
371 fprintf(f, "\tbssid=%s\n", value);
372 os_free(value);
373 }
374
375
write_psk(FILE * f,struct wpa_ssid * ssid)376 static void write_psk(FILE *f, struct wpa_ssid *ssid)
377 {
378 char *value = wpa_config_get(ssid, "psk");
379 if (value == NULL)
380 return;
381 fprintf(f, "\tpsk=%s\n", value);
382 os_free(value);
383 }
384
385
write_proto(FILE * f,struct wpa_ssid * ssid)386 static void write_proto(FILE *f, struct wpa_ssid *ssid)
387 {
388 char *value;
389
390 if (ssid->proto == DEFAULT_PROTO)
391 return;
392
393 value = wpa_config_get(ssid, "proto");
394 if (value == NULL)
395 return;
396 if (value[0])
397 fprintf(f, "\tproto=%s\n", value);
398 os_free(value);
399 }
400
401
write_key_mgmt(FILE * f,struct wpa_ssid * ssid)402 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
403 {
404 char *value;
405
406 if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
407 return;
408
409 value = wpa_config_get(ssid, "key_mgmt");
410 if (value == NULL)
411 return;
412 if (value[0])
413 fprintf(f, "\tkey_mgmt=%s\n", value);
414 os_free(value);
415 }
416
417
write_pairwise(FILE * f,struct wpa_ssid * ssid)418 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
419 {
420 char *value;
421
422 if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
423 return;
424
425 value = wpa_config_get(ssid, "pairwise");
426 if (value == NULL)
427 return;
428 if (value[0])
429 fprintf(f, "\tpairwise=%s\n", value);
430 os_free(value);
431 }
432
433
write_group(FILE * f,struct wpa_ssid * ssid)434 static void write_group(FILE *f, struct wpa_ssid *ssid)
435 {
436 char *value;
437
438 if (ssid->group_cipher == DEFAULT_GROUP)
439 return;
440
441 value = wpa_config_get(ssid, "group");
442 if (value == NULL)
443 return;
444 if (value[0])
445 fprintf(f, "\tgroup=%s\n", value);
446 os_free(value);
447 }
448
449
write_auth_alg(FILE * f,struct wpa_ssid * ssid)450 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
451 {
452 char *value;
453
454 if (ssid->auth_alg == 0)
455 return;
456
457 value = wpa_config_get(ssid, "auth_alg");
458 if (value == NULL)
459 return;
460 if (value[0])
461 fprintf(f, "\tauth_alg=%s\n", value);
462 os_free(value);
463 }
464
465
466 #ifdef IEEE8021X_EAPOL
write_eap(FILE * f,struct wpa_ssid * ssid)467 static void write_eap(FILE *f, struct wpa_ssid *ssid)
468 {
469 char *value;
470
471 value = wpa_config_get(ssid, "eap");
472 if (value == NULL)
473 return;
474
475 if (value[0])
476 fprintf(f, "\teap=%s\n", value);
477 os_free(value);
478 }
479 #endif /* IEEE8021X_EAPOL */
480
481
write_wep_key(FILE * f,int idx,struct wpa_ssid * ssid)482 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
483 {
484 char field[20], *value;
485 int res;
486
487 res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
488 if (res < 0 || (size_t) res >= sizeof(field))
489 return;
490 value = wpa_config_get(ssid, field);
491 if (value) {
492 fprintf(f, "\t%s=%s\n", field, value);
493 os_free(value);
494 }
495 }
496
497
wpa_config_write_network(FILE * f,struct wpa_ssid * ssid)498 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
499 {
500 int i;
501
502 #define STR(t) write_str(f, #t, ssid)
503 #define INT(t) write_int(f, #t, ssid->t, 0)
504 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
505 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
506 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
507
508 STR(ssid);
509 INT(scan_ssid);
510 write_bssid(f, ssid);
511 write_psk(f, ssid);
512 write_proto(f, ssid);
513 write_key_mgmt(f, ssid);
514 write_pairwise(f, ssid);
515 write_group(f, ssid);
516 write_auth_alg(f, ssid);
517 #ifdef IEEE8021X_EAPOL
518 write_eap(f, ssid);
519 STR(identity);
520 STR(anonymous_identity);
521 STR(password);
522 STR(ca_cert);
523 STR(ca_path);
524 STR(client_cert);
525 STR(private_key);
526 STR(private_key_passwd);
527 STR(dh_file);
528 STR(subject_match);
529 STR(altsubject_match);
530 STR(ca_cert2);
531 STR(ca_path2);
532 STR(client_cert2);
533 STR(private_key2);
534 STR(private_key2_passwd);
535 STR(dh_file2);
536 STR(subject_match2);
537 STR(altsubject_match2);
538 STR(phase1);
539 STR(phase2);
540 STR(pcsc);
541 STR(pin);
542 STR(engine_id);
543 STR(key_id);
544 STR(cert_id);
545 STR(ca_cert_id);
546 STR(key2_id);
547 STR(pin2);
548 STR(engine2_id);
549 STR(cert2_id);
550 STR(ca_cert2_id);
551 INTe(engine);
552 INTe(engine2);
553 INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
554 #endif /* IEEE8021X_EAPOL */
555 for (i = 0; i < 4; i++)
556 write_wep_key(f, i, ssid);
557 INT(wep_tx_keyidx);
558 INT(priority);
559 #ifdef IEEE8021X_EAPOL
560 INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
561 STR(pac_file);
562 INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
563 #endif /* IEEE8021X_EAPOL */
564 INT(mode);
565 INT(proactive_key_caching);
566 INT(disabled);
567 INT(peerkey);
568 #ifdef CONFIG_IEEE80211W
569 INT(ieee80211w);
570 #endif /* CONFIG_IEEE80211W */
571 STR(id_str);
572
573 #undef STR
574 #undef INT
575 #undef INT_DEF
576 }
577
578
579 #ifndef CONFIG_NO_CONFIG_BLOBS
wpa_config_write_blob(FILE * f,struct wpa_config_blob * blob)580 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
581 {
582 unsigned char *encoded;
583
584 encoded = base64_encode(blob->data, blob->len, NULL);
585 if (encoded == NULL)
586 return -1;
587
588 fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
589 os_free(encoded);
590 return 0;
591 }
592 #endif /* CONFIG_NO_CONFIG_BLOBS */
593
594
wpa_config_write_global(FILE * f,struct wpa_config * config)595 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
596 {
597 #ifdef CONFIG_CTRL_IFACE
598 if (config->ctrl_interface)
599 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
600 if (config->ctrl_interface_group)
601 fprintf(f, "ctrl_interface_group=%s\n",
602 config->ctrl_interface_group);
603 #endif /* CONFIG_CTRL_IFACE */
604 if (config->eapol_version != DEFAULT_EAPOL_VERSION)
605 fprintf(f, "eapol_version=%d\n", config->eapol_version);
606 if (config->ap_scan != DEFAULT_AP_SCAN)
607 fprintf(f, "ap_scan=%d\n", config->ap_scan);
608 if (config->fast_reauth != DEFAULT_FAST_REAUTH)
609 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
610 if (config->opensc_engine_path)
611 fprintf(f, "opensc_engine_path=%s\n",
612 config->opensc_engine_path);
613 if (config->pkcs11_engine_path)
614 fprintf(f, "pkcs11_engine_path=%s\n",
615 config->pkcs11_engine_path);
616 if (config->pkcs11_module_path)
617 fprintf(f, "pkcs11_module_path=%s\n",
618 config->pkcs11_module_path);
619 if (config->driver_param)
620 fprintf(f, "driver_param=%s\n", config->driver_param);
621 if (config->dot11RSNAConfigPMKLifetime)
622 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
623 config->dot11RSNAConfigPMKLifetime);
624 if (config->dot11RSNAConfigPMKReauthThreshold)
625 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
626 config->dot11RSNAConfigPMKReauthThreshold);
627 if (config->dot11RSNAConfigSATimeout)
628 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
629 config->dot11RSNAConfigSATimeout);
630 if (config->update_config)
631 fprintf(f, "update_config=%d\n", config->update_config);
632 #ifdef CONFIG_WPS
633 if (!is_nil_uuid(config->uuid)) {
634 char buf[40];
635 uuid_bin2str(config->uuid, buf, sizeof(buf));
636 fprintf(f, "uuid=%s\n", buf);
637 }
638 if (config->device_name)
639 fprintf(f, "device_name=%s\n", config->device_name);
640 if (config->manufacturer)
641 fprintf(f, "manufacturer=%s\n", config->manufacturer);
642 if (config->model_name)
643 fprintf(f, "model_name=%s\n", config->model_name);
644 if (config->model_number)
645 fprintf(f, "model_number=%s\n", config->model_number);
646 if (config->serial_number)
647 fprintf(f, "serial_number=%s\n", config->serial_number);
648 {
649 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
650 buf = wps_dev_type_bin2str(config->device_type,
651 _buf, sizeof(_buf));
652 fprintf(f, "device_type=%s\n", buf);
653 }
654 if (WPA_GET_BE32(config->os_version))
655 fprintf(f, "os_version=%08x\n",
656 WPA_GET_BE32(config->os_version));
657 if (config->config_methods)
658 fprintf(f, "config_methods=%s\n", config->config_methods);
659 if (config->wps_cred_processing)
660 fprintf(f, "wps_cred_processing=%d\n",
661 config->wps_cred_processing);
662 #endif /* CONFIG_WPS */
663 #ifdef CONFIG_P2P
664 if (config->p2p_listen_reg_class)
665 fprintf(f, "p2p_listen_reg_class=%u\n",
666 config->p2p_listen_reg_class);
667 if (config->p2p_listen_channel)
668 fprintf(f, "p2p_listen_channel=%u\n",
669 config->p2p_listen_channel);
670 if (config->p2p_oper_reg_class)
671 fprintf(f, "p2p_oper_reg_class=%u\n",
672 config->p2p_oper_reg_class);
673 if (config->p2p_oper_channel)
674 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
675 if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
676 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
677 if (config->p2p_ssid_postfix)
678 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
679 if (config->persistent_reconnect)
680 fprintf(f, "persistent_reconnect=%u\n",
681 config->persistent_reconnect);
682 if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
683 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
684 if (config->p2p_group_idle)
685 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
686 #endif /* CONFIG_P2P */
687 if (config->country[0] && config->country[1]) {
688 fprintf(f, "country=%c%c\n",
689 config->country[0], config->country[1]);
690 }
691 if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
692 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
693 if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
694 fprintf(f, "bss_expiration_age=%u\n",
695 config->bss_expiration_age);
696 if (config->bss_expiration_scan_count !=
697 DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
698 fprintf(f, "bss_expiration_scan_count=%u\n",
699 config->bss_expiration_scan_count);
700 if (config->filter_ssids)
701 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
702 if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
703 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
704 if (config->disassoc_low_ack)
705 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
706 }
707
708 #endif /* CONFIG_NO_CONFIG_WRITE */
709
710
wpa_config_write(const char * name,struct wpa_config * config)711 int wpa_config_write(const char *name, struct wpa_config *config)
712 {
713 #ifndef CONFIG_NO_CONFIG_WRITE
714 FILE *f;
715 struct wpa_ssid *ssid;
716 #ifndef CONFIG_NO_CONFIG_BLOBS
717 struct wpa_config_blob *blob;
718 #endif /* CONFIG_NO_CONFIG_BLOBS */
719 int ret = 0;
720
721 wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
722
723 f = fopen(name, "w");
724 if (f == NULL) {
725 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
726 return -1;
727 }
728
729 wpa_config_write_global(f, config);
730
731 for (ssid = config->ssid; ssid; ssid = ssid->next) {
732 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
733 continue; /* do not save temporary networks */
734 fprintf(f, "\nnetwork={\n");
735 wpa_config_write_network(f, ssid);
736 fprintf(f, "}\n");
737 }
738
739 #ifndef CONFIG_NO_CONFIG_BLOBS
740 for (blob = config->blobs; blob; blob = blob->next) {
741 ret = wpa_config_write_blob(f, blob);
742 if (ret)
743 break;
744 }
745 #endif /* CONFIG_NO_CONFIG_BLOBS */
746
747 fclose(f);
748
749 wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
750 name, ret ? "un" : "");
751 return ret;
752 #else /* CONFIG_NO_CONFIG_WRITE */
753 return -1;
754 #endif /* CONFIG_NO_CONFIG_WRITE */
755 }
756