config_file.c revision 1f69aa52ea2e0a73ac502565df8c666ee49cab6a 
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 */
41static 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
94static 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
127static 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
188static 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
244static 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
270struct 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
346static 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
356static 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
364static 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
374static 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
384static 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
400static 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
416static 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
432static 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
448static 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
465static 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
480static 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#ifdef CONFIG_P2P
497static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
498{
499	char *value = wpa_config_get(ssid, "p2p_client_list");
500	if (value == NULL)
501		return;
502	fprintf(f, "\tp2p_client_list=%s\n", value);
503	os_free(value);
504}
505#endif /* CONFIG_P2P */
506
507
508static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
509{
510	int i;
511
512#define STR(t) write_str(f, #t, ssid)
513#define INT(t) write_int(f, #t, ssid->t, 0)
514#define INTe(t) write_int(f, #t, ssid->eap.t, 0)
515#define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
516#define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
517
518	STR(ssid);
519	INT(scan_ssid);
520	write_bssid(f, ssid);
521	write_psk(f, ssid);
522	write_proto(f, ssid);
523	write_key_mgmt(f, ssid);
524	write_pairwise(f, ssid);
525	write_group(f, ssid);
526	write_auth_alg(f, ssid);
527#ifdef IEEE8021X_EAPOL
528	write_eap(f, ssid);
529	STR(identity);
530	STR(anonymous_identity);
531	STR(password);
532	STR(ca_cert);
533	STR(ca_path);
534	STR(client_cert);
535	STR(private_key);
536	STR(private_key_passwd);
537	STR(dh_file);
538	STR(subject_match);
539	STR(altsubject_match);
540	STR(ca_cert2);
541	STR(ca_path2);
542	STR(client_cert2);
543	STR(private_key2);
544	STR(private_key2_passwd);
545	STR(dh_file2);
546	STR(subject_match2);
547	STR(altsubject_match2);
548	STR(phase1);
549	STR(phase2);
550	STR(pcsc);
551	STR(pin);
552	STR(engine_id);
553	STR(key_id);
554	STR(cert_id);
555	STR(ca_cert_id);
556	STR(key2_id);
557	STR(pin2);
558	STR(engine2_id);
559	STR(cert2_id);
560	STR(ca_cert2_id);
561	INTe(engine);
562	INTe(engine2);
563	INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
564#endif /* IEEE8021X_EAPOL */
565	for (i = 0; i < 4; i++)
566		write_wep_key(f, i, ssid);
567	INT(wep_tx_keyidx);
568	INT(priority);
569#ifdef IEEE8021X_EAPOL
570	INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
571	STR(pac_file);
572	INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
573#endif /* IEEE8021X_EAPOL */
574	INT(mode);
575	INT(proactive_key_caching);
576	INT(disabled);
577	INT(peerkey);
578#ifdef CONFIG_IEEE80211W
579	INT(ieee80211w);
580#endif /* CONFIG_IEEE80211W */
581	STR(id_str);
582#ifdef CONFIG_P2P
583	write_p2p_client_list(f, ssid);
584#endif /* CONFIG_P2P */
585
586#undef STR
587#undef INT
588#undef INT_DEF
589}
590
591
592#ifndef CONFIG_NO_CONFIG_BLOBS
593static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
594{
595	unsigned char *encoded;
596
597	encoded = base64_encode(blob->data, blob->len, NULL);
598	if (encoded == NULL)
599		return -1;
600
601	fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
602	os_free(encoded);
603	return 0;
604}
605#endif /* CONFIG_NO_CONFIG_BLOBS */
606
607
608static void wpa_config_write_global(FILE *f, struct wpa_config *config)
609{
610#ifdef CONFIG_CTRL_IFACE
611	if (config->ctrl_interface)
612		fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
613	if (config->ctrl_interface_group)
614		fprintf(f, "ctrl_interface_group=%s\n",
615			config->ctrl_interface_group);
616#endif /* CONFIG_CTRL_IFACE */
617	if (config->eapol_version != DEFAULT_EAPOL_VERSION)
618		fprintf(f, "eapol_version=%d\n", config->eapol_version);
619	if (config->ap_scan != DEFAULT_AP_SCAN)
620		fprintf(f, "ap_scan=%d\n", config->ap_scan);
621	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
622		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
623	if (config->opensc_engine_path)
624		fprintf(f, "opensc_engine_path=%s\n",
625			config->opensc_engine_path);
626	if (config->pkcs11_engine_path)
627		fprintf(f, "pkcs11_engine_path=%s\n",
628			config->pkcs11_engine_path);
629	if (config->pkcs11_module_path)
630		fprintf(f, "pkcs11_module_path=%s\n",
631			config->pkcs11_module_path);
632	if (config->driver_param)
633		fprintf(f, "driver_param=%s\n", config->driver_param);
634	if (config->dot11RSNAConfigPMKLifetime)
635		fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
636			config->dot11RSNAConfigPMKLifetime);
637	if (config->dot11RSNAConfigPMKReauthThreshold)
638		fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
639			config->dot11RSNAConfigPMKReauthThreshold);
640	if (config->dot11RSNAConfigSATimeout)
641		fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
642			config->dot11RSNAConfigSATimeout);
643	if (config->update_config)
644		fprintf(f, "update_config=%d\n", config->update_config);
645#ifdef CONFIG_WPS
646	if (!is_nil_uuid(config->uuid)) {
647		char buf[40];
648		uuid_bin2str(config->uuid, buf, sizeof(buf));
649		fprintf(f, "uuid=%s\n", buf);
650	}
651	if (config->device_name)
652		fprintf(f, "device_name=%s\n", config->device_name);
653	if (config->manufacturer)
654		fprintf(f, "manufacturer=%s\n", config->manufacturer);
655	if (config->model_name)
656		fprintf(f, "model_name=%s\n", config->model_name);
657	if (config->model_number)
658		fprintf(f, "model_number=%s\n", config->model_number);
659	if (config->serial_number)
660		fprintf(f, "serial_number=%s\n", config->serial_number);
661	{
662		char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
663		buf = wps_dev_type_bin2str(config->device_type,
664					   _buf, sizeof(_buf));
665		if (os_strcmp(buf, "0-00000000-0") != 0)
666			fprintf(f, "device_type=%s\n", buf);
667	}
668	if (WPA_GET_BE32(config->os_version))
669		fprintf(f, "os_version=%08x\n",
670			WPA_GET_BE32(config->os_version));
671	if (config->config_methods)
672		fprintf(f, "config_methods=%s\n", config->config_methods);
673	if (config->wps_cred_processing)
674		fprintf(f, "wps_cred_processing=%d\n",
675			config->wps_cred_processing);
676#endif /* CONFIG_WPS */
677#ifdef CONFIG_P2P
678	if (config->p2p_listen_reg_class)
679		fprintf(f, "p2p_listen_reg_class=%u\n",
680			config->p2p_listen_reg_class);
681	if (config->p2p_listen_channel)
682		fprintf(f, "p2p_listen_channel=%u\n",
683			config->p2p_listen_channel);
684	if (config->p2p_oper_reg_class)
685		fprintf(f, "p2p_oper_reg_class=%u\n",
686			config->p2p_oper_reg_class);
687	if (config->p2p_oper_channel)
688		fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
689	if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
690		fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
691	if (config->p2p_ssid_postfix)
692		fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
693	if (config->persistent_reconnect)
694		fprintf(f, "persistent_reconnect=%u\n",
695			config->persistent_reconnect);
696	if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
697		fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
698	if (config->p2p_group_idle)
699		fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
700#endif /* CONFIG_P2P */
701	if (config->country[0] && config->country[1]) {
702		fprintf(f, "country=%c%c\n",
703			config->country[0], config->country[1]);
704	}
705	if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
706		fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
707	if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
708		fprintf(f, "bss_expiration_age=%u\n",
709			config->bss_expiration_age);
710	if (config->bss_expiration_scan_count !=
711	    DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
712		fprintf(f, "bss_expiration_scan_count=%u\n",
713			config->bss_expiration_scan_count);
714	if (config->filter_ssids)
715		fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
716	if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
717		fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
718	if (config->disassoc_low_ack)
719		fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
720#ifdef CONFIG_INTERWORKING
721	if (config->home_realm)
722		fprintf(f, "home_realm=%s\n", config->home_realm);
723	if (config->home_username)
724		fprintf(f, "home_username=%s\n", config->home_username);
725	if (config->home_password)
726		fprintf(f, "home_password=%s\n", config->home_password);
727	if (config->home_ca_cert)
728		fprintf(f, "home_ca_cert=%s\n", config->home_ca_cert);
729	if (config->home_imsi)
730		fprintf(f, "home_imsi=%s\n", config->home_imsi);
731	if (config->home_milenage)
732		fprintf(f, "home_milenage=%s\n", config->home_milenage);
733	if (config->interworking)
734		fprintf(f, "interworking=%u\n", config->interworking);
735	if (!is_zero_ether_addr(config->hessid))
736		fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
737	if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
738		fprintf(f, "access_network_type=%d\n",
739			config->access_network_type);
740#endif /* CONFIG_INTERWORKING */
741}
742
743#endif /* CONFIG_NO_CONFIG_WRITE */
744
745
746int wpa_config_write(const char *name, struct wpa_config *config)
747{
748#ifndef CONFIG_NO_CONFIG_WRITE
749	FILE *f;
750	struct wpa_ssid *ssid;
751#ifndef CONFIG_NO_CONFIG_BLOBS
752	struct wpa_config_blob *blob;
753#endif /* CONFIG_NO_CONFIG_BLOBS */
754	int ret = 0;
755
756	wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
757
758	f = fopen(name, "w");
759	if (f == NULL) {
760		wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
761		return -1;
762	}
763
764	wpa_config_write_global(f, config);
765
766	for (ssid = config->ssid; ssid; ssid = ssid->next) {
767		if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
768			continue; /* do not save temporary networks */
769		if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
770		    !ssid->passphrase)
771			continue; /* do not save invalid network */
772		fprintf(f, "\nnetwork={\n");
773		wpa_config_write_network(f, ssid);
774		fprintf(f, "}\n");
775	}
776
777#ifndef CONFIG_NO_CONFIG_BLOBS
778	for (blob = config->blobs; blob; blob = blob->next) {
779		ret = wpa_config_write_blob(f, blob);
780		if (ret)
781			break;
782	}
783#endif /* CONFIG_NO_CONFIG_BLOBS */
784
785	fclose(f);
786
787	wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
788		   name, ret ? "un" : "");
789	return ret;
790#else /* CONFIG_NO_CONFIG_WRITE */
791	return -1;
792#endif /* CONFIG_NO_CONFIG_WRITE */
793}
794