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1 /*
2  * WPA Supplicant / Configuration file structures
3  * Copyright (c) 2003-2012, 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 
9 #ifndef CONFIG_H
10 #define CONFIG_H
11 
12 #define DEFAULT_EAPOL_VERSION 1
13 #ifdef CONFIG_NO_SCAN_PROCESSING
14 #define DEFAULT_AP_SCAN 2
15 #else /* CONFIG_NO_SCAN_PROCESSING */
16 #define DEFAULT_AP_SCAN 1
17 #endif /* CONFIG_NO_SCAN_PROCESSING */
18 #define DEFAULT_FAST_REAUTH 1
19 #define DEFAULT_P2P_GO_INTENT 7
20 #define DEFAULT_P2P_INTRA_BSS 1
21 #define DEFAULT_P2P_GO_MAX_INACTIVITY (5 * 60)
22 #define DEFAULT_BSS_MAX_COUNT 200
23 #define DEFAULT_BSS_EXPIRATION_AGE 180
24 #define DEFAULT_BSS_EXPIRATION_SCAN_COUNT 2
25 #define DEFAULT_MAX_NUM_STA 128
26 #define DEFAULT_ACCESS_NETWORK_TYPE 15
27 
28 #include "config_ssid.h"
29 #include "wps/wps.h"
30 #include "common/ieee802_11_common.h"
31 
32 
33 struct wpa_cred {
34 	/**
35 	 * next - Next credential in the list
36 	 *
37 	 * This pointer can be used to iterate over all credentials. The head
38 	 * of this list is stored in the cred field of struct wpa_config.
39 	 */
40 	struct wpa_cred *next;
41 
42 	/**
43 	 * id - Unique id for the credential
44 	 *
45 	 * This identifier is used as a unique identifier for each credential
46 	 * block when using the control interface. Each credential is allocated
47 	 * an id when it is being created, either when reading the
48 	 * configuration file or when a new credential is added through the
49 	 * control interface.
50 	 */
51 	int id;
52 
53 	/**
54 	 * priority - Priority group
55 	 *
56 	 * By default, all networks and credentials get the same priority group
57 	 * (0). This field can be used to give higher priority for credentials
58 	 * (and similarly in struct wpa_ssid for network blocks) to change the
59 	 * Interworking automatic networking selection behavior. The matching
60 	 * network (based on either an enabled network block or a credential)
61 	 * with the highest priority value will be selected.
62 	 */
63 	int priority;
64 
65 	/**
66 	 * pcsc - Use PC/SC and SIM/USIM card
67 	 */
68 	int pcsc;
69 
70 	/**
71 	 * realm - Home Realm for Interworking
72 	 */
73 	char *realm;
74 
75 	/**
76 	 * username - Username for Interworking network selection
77 	 */
78 	char *username;
79 
80 	/**
81 	 * password - Password for Interworking network selection
82 	 */
83 	char *password;
84 
85 	/**
86 	 * ext_password - Whether password is a name for external storage
87 	 */
88 	int ext_password;
89 
90 	/**
91 	 * ca_cert - CA certificate for Interworking network selection
92 	 */
93 	char *ca_cert;
94 
95 	/**
96 	 * client_cert - File path to client certificate file (PEM/DER)
97 	 *
98 	 * This field is used with Interworking networking selection for a case
99 	 * where client certificate/private key is used for authentication
100 	 * (EAP-TLS). Full path to the file should be used since working
101 	 * directory may change when wpa_supplicant is run in the background.
102 	 *
103 	 * Alternatively, a named configuration blob can be used by setting
104 	 * this to blob://blob_name.
105 	 */
106 	char *client_cert;
107 
108 	/**
109 	 * private_key - File path to client private key file (PEM/DER/PFX)
110 	 *
111 	 * When PKCS#12/PFX file (.p12/.pfx) is used, client_cert should be
112 	 * commented out. Both the private key and certificate will be read
113 	 * from the PKCS#12 file in this case. Full path to the file should be
114 	 * used since working directory may change when wpa_supplicant is run
115 	 * in the background.
116 	 *
117 	 * Windows certificate store can be used by leaving client_cert out and
118 	 * configuring private_key in one of the following formats:
119 	 *
120 	 * cert://substring_to_match
121 	 *
122 	 * hash://certificate_thumbprint_in_hex
123 	 *
124 	 * For example: private_key="hash://63093aa9c47f56ae88334c7b65a4"
125 	 *
126 	 * Note that when running wpa_supplicant as an application, the user
127 	 * certificate store (My user account) is used, whereas computer store
128 	 * (Computer account) is used when running wpasvc as a service.
129 	 *
130 	 * Alternatively, a named configuration blob can be used by setting
131 	 * this to blob://blob_name.
132 	 */
133 	char *private_key;
134 
135 	/**
136 	 * private_key_passwd - Password for private key file
137 	 */
138 	char *private_key_passwd;
139 
140 	/**
141 	 * imsi - IMSI in <MCC> | <MNC> | '-' | <MSIN> format
142 	 */
143 	char *imsi;
144 
145 	/**
146 	 * milenage - Milenage parameters for SIM/USIM simulator in
147 	 *	<Ki>:<OPc>:<SQN> format
148 	 */
149 	char *milenage;
150 
151 	/**
152 	 * domain - Home service provider FQDN
153 	 *
154 	 * This is used to compare against the Domain Name List to figure out
155 	 * whether the AP is operated by the Home SP.
156 	 */
157 	char *domain;
158 
159 	/**
160 	 * roaming_consortium - Roaming Consortium OI
161 	 *
162 	 * If roaming_consortium_len is non-zero, this field contains the
163 	 * Roaming Consortium OI that can be used to determine which access
164 	 * points support authentication with this credential. This is an
165 	 * alternative to the use of the realm parameter. When using Roaming
166 	 * Consortium to match the network, the EAP parameters need to be
167 	 * pre-configured with the credential since the NAI Realm information
168 	 * may not be available or fetched.
169 	 */
170 	u8 roaming_consortium[15];
171 
172 	/**
173 	 * roaming_consortium_len - Length of roaming_consortium
174 	 */
175 	size_t roaming_consortium_len;
176 
177 	/**
178 	 * eap_method - EAP method to use
179 	 *
180 	 * Pre-configured EAP method to use with this credential or %NULL to
181 	 * indicate no EAP method is selected, i.e., the method will be
182 	 * selected automatically based on ANQP information.
183 	 */
184 	struct eap_method_type *eap_method;
185 
186 	/**
187 	 * phase1 - Phase 1 (outer authentication) parameters
188 	 *
189 	 * Pre-configured EAP parameters or %NULL.
190 	 */
191 	char *phase1;
192 
193 	/**
194 	 * phase2 - Phase 2 (inner authentication) parameters
195 	 *
196 	 * Pre-configured EAP parameters or %NULL.
197 	 */
198 	char *phase2;
199 
200 	struct excluded_ssid {
201 		u8 ssid[MAX_SSID_LEN];
202 		size_t ssid_len;
203 	} *excluded_ssid;
204 	size_t num_excluded_ssid;
205 };
206 
207 
208 #define CFG_CHANGED_DEVICE_NAME BIT(0)
209 #define CFG_CHANGED_CONFIG_METHODS BIT(1)
210 #define CFG_CHANGED_DEVICE_TYPE BIT(2)
211 #define CFG_CHANGED_OS_VERSION BIT(3)
212 #define CFG_CHANGED_UUID BIT(4)
213 #define CFG_CHANGED_COUNTRY BIT(5)
214 #define CFG_CHANGED_SEC_DEVICE_TYPE BIT(6)
215 #define CFG_CHANGED_P2P_SSID_POSTFIX BIT(7)
216 #define CFG_CHANGED_WPS_STRING BIT(8)
217 #define CFG_CHANGED_P2P_INTRA_BSS BIT(9)
218 #define CFG_CHANGED_VENDOR_EXTENSION BIT(10)
219 #define CFG_CHANGED_P2P_LISTEN_CHANNEL BIT(11)
220 #define CFG_CHANGED_P2P_OPER_CHANNEL BIT(12)
221 #define CFG_CHANGED_P2P_PREF_CHAN BIT(13)
222 #define CFG_CHANGED_EXT_PW_BACKEND BIT(14)
223 #define CFG_CHANGED_NFC_PASSWORD_TOKEN BIT(15)
224 
225 /**
226  * struct wpa_config - wpa_supplicant configuration data
227  *
228  * This data structure is presents the per-interface (radio) configuration
229  * data. In many cases, there is only one struct wpa_config instance, but if
230  * more than one network interface is being controlled, one instance is used
231  * for each.
232  */
233 struct wpa_config {
234 	/**
235 	 * ssid - Head of the global network list
236 	 *
237 	 * This is the head for the list of all the configured networks.
238 	 */
239 	struct wpa_ssid *ssid;
240 
241 	/**
242 	 * pssid - Per-priority network lists (in priority order)
243 	 */
244 	struct wpa_ssid **pssid;
245 
246 	/**
247 	 * num_prio - Number of different priorities used in the pssid lists
248 	 *
249 	 * This indicates how many per-priority network lists are included in
250 	 * pssid.
251 	 */
252 	int num_prio;
253 
254 	/**
255 	 * cred - Head of the credential list
256 	 *
257 	 * This is the head for the list of all the configured credentials.
258 	 */
259 	struct wpa_cred *cred;
260 
261 	/**
262 	 * eapol_version - IEEE 802.1X/EAPOL version number
263 	 *
264 	 * wpa_supplicant is implemented based on IEEE Std 802.1X-2004 which
265 	 * defines EAPOL version 2. However, there are many APs that do not
266 	 * handle the new version number correctly (they seem to drop the
267 	 * frames completely). In order to make wpa_supplicant interoperate
268 	 * with these APs, the version number is set to 1 by default. This
269 	 * configuration value can be used to set it to the new version (2).
270 	 */
271 	int eapol_version;
272 
273 	/**
274 	 * ap_scan - AP scanning/selection
275 	 *
276 	 * By default, wpa_supplicant requests driver to perform AP
277 	 * scanning and then uses the scan results to select a
278 	 * suitable AP. Another alternative is to allow the driver to
279 	 * take care of AP scanning and selection and use
280 	 * wpa_supplicant just to process EAPOL frames based on IEEE
281 	 * 802.11 association information from the driver.
282 	 *
283 	 * 1: wpa_supplicant initiates scanning and AP selection (default).
284 	 *
285 	 * 0: Driver takes care of scanning, AP selection, and IEEE 802.11
286 	 * association parameters (e.g., WPA IE generation); this mode can
287 	 * also be used with non-WPA drivers when using IEEE 802.1X mode;
288 	 * do not try to associate with APs (i.e., external program needs
289 	 * to control association). This mode must also be used when using
290 	 * wired Ethernet drivers.
291 	 *
292 	 * 2: like 0, but associate with APs using security policy and SSID
293 	 * (but not BSSID); this can be used, e.g., with ndiswrapper and NDIS
294 	 * drivers to enable operation with hidden SSIDs and optimized roaming;
295 	 * in this mode, the network blocks in the configuration are tried
296 	 * one by one until the driver reports successful association; each
297 	 * network block should have explicit security policy (i.e., only one
298 	 * option in the lists) for key_mgmt, pairwise, group, proto variables.
299 	 */
300 	int ap_scan;
301 
302 	/**
303 	 * disable_scan_offload - Disable automatic offloading of scan requests
304 	 *
305 	 * By default, %wpa_supplicant tries to offload scanning if the driver
306 	 * indicates support for this (sched_scan). This configuration
307 	 * parameter can be used to disable this offloading mechanism.
308 	 */
309 	int disable_scan_offload;
310 
311 	/**
312 	 * ctrl_interface - Parameters for the control interface
313 	 *
314 	 * If this is specified, %wpa_supplicant will open a control interface
315 	 * that is available for external programs to manage %wpa_supplicant.
316 	 * The meaning of this string depends on which control interface
317 	 * mechanism is used. For all cases, the existence of this parameter
318 	 * in configuration is used to determine whether the control interface
319 	 * is enabled.
320 	 *
321 	 * For UNIX domain sockets (default on Linux and BSD): This is a
322 	 * directory that will be created for UNIX domain sockets for listening
323 	 * to requests from external programs (CLI/GUI, etc.) for status
324 	 * information and configuration. The socket file will be named based
325 	 * on the interface name, so multiple %wpa_supplicant processes can be
326 	 * run at the same time if more than one interface is used.
327 	 * /var/run/wpa_supplicant is the recommended directory for sockets and
328 	 * by default, wpa_cli will use it when trying to connect with
329 	 * %wpa_supplicant.
330 	 *
331 	 * Access control for the control interface can be configured
332 	 * by setting the directory to allow only members of a group
333 	 * to use sockets. This way, it is possible to run
334 	 * %wpa_supplicant as root (since it needs to change network
335 	 * configuration and open raw sockets) and still allow GUI/CLI
336 	 * components to be run as non-root users. However, since the
337 	 * control interface can be used to change the network
338 	 * configuration, this access needs to be protected in many
339 	 * cases. By default, %wpa_supplicant is configured to use gid
340 	 * 0 (root). If you want to allow non-root users to use the
341 	 * control interface, add a new group and change this value to
342 	 * match with that group. Add users that should have control
343 	 * interface access to this group.
344 	 *
345 	 * When configuring both the directory and group, use following format:
346 	 * DIR=/var/run/wpa_supplicant GROUP=wheel
347 	 * DIR=/var/run/wpa_supplicant GROUP=0
348 	 * (group can be either group name or gid)
349 	 *
350 	 * For UDP connections (default on Windows): The value will be ignored.
351 	 * This variable is just used to select that the control interface is
352 	 * to be created. The value can be set to, e.g., udp
353 	 * (ctrl_interface=udp).
354 	 *
355 	 * For Windows Named Pipe: This value can be used to set the security
356 	 * descriptor for controlling access to the control interface. Security
357 	 * descriptor can be set using Security Descriptor String Format (see
358 	 * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/security_descriptor_string_format.asp).
359 	 * The descriptor string needs to be prefixed with SDDL=. For example,
360 	 * ctrl_interface=SDDL=D: would set an empty DACL (which will reject
361 	 * all connections).
362 	 */
363 	char *ctrl_interface;
364 
365 	/**
366 	 * ctrl_interface_group - Control interface group (DEPRECATED)
367 	 *
368 	 * This variable is only used for backwards compatibility. Group for
369 	 * UNIX domain sockets should now be specified using GROUP=group in
370 	 * ctrl_interface variable.
371 	 */
372 	char *ctrl_interface_group;
373 
374 	/**
375 	 * fast_reauth - EAP fast re-authentication (session resumption)
376 	 *
377 	 * By default, fast re-authentication is enabled for all EAP methods
378 	 * that support it. This variable can be used to disable fast
379 	 * re-authentication (by setting fast_reauth=0). Normally, there is no
380 	 * need to disable fast re-authentication.
381 	 */
382 	int fast_reauth;
383 
384 	/**
385 	 * opensc_engine_path - Path to the OpenSSL engine for opensc
386 	 *
387 	 * This is an OpenSSL specific configuration option for loading OpenSC
388 	 * engine (engine_opensc.so); if %NULL, this engine is not loaded.
389 	 */
390 	char *opensc_engine_path;
391 
392 	/**
393 	 * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
394 	 *
395 	 * This is an OpenSSL specific configuration option for loading PKCS#11
396 	 * engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
397 	 */
398 	char *pkcs11_engine_path;
399 
400 	/**
401 	 * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
402 	 *
403 	 * This is an OpenSSL specific configuration option for configuring
404 	 * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
405 	 * module is not loaded.
406 	 */
407 	char *pkcs11_module_path;
408 
409 	/**
410 	 * pcsc_reader - PC/SC reader name prefix
411 	 *
412 	 * If not %NULL, PC/SC reader with a name that matches this prefix is
413 	 * initialized for SIM/USIM access. Empty string can be used to match
414 	 * the first available reader.
415 	 */
416 	char *pcsc_reader;
417 
418 	/**
419 	 * pcsc_pin - PIN for USIM, GSM SIM, and smartcards
420 	 *
421 	 * This field is used to configure PIN for SIM/USIM for EAP-SIM and
422 	 * EAP-AKA. If left out, this will be asked through control interface.
423 	 */
424 	char *pcsc_pin;
425 
426 	/**
427 	 * driver_param - Driver interface parameters
428 	 *
429 	 * This text string is passed to the selected driver interface with the
430 	 * optional struct wpa_driver_ops::set_param() handler. This can be
431 	 * used to configure driver specific options without having to add new
432 	 * driver interface functionality.
433 	 */
434 	char *driver_param;
435 
436 	/**
437 	 * dot11RSNAConfigPMKLifetime - Maximum lifetime of a PMK
438 	 *
439 	 * dot11 MIB variable for the maximum lifetime of a PMK in the PMK
440 	 * cache (unit: seconds).
441 	 */
442 	unsigned int dot11RSNAConfigPMKLifetime;
443 
444 	/**
445 	 * dot11RSNAConfigPMKReauthThreshold - PMK re-authentication threshold
446 	 *
447 	 * dot11 MIB variable for the percentage of the PMK lifetime
448 	 * that should expire before an IEEE 802.1X reauthentication occurs.
449 	 */
450 	unsigned int dot11RSNAConfigPMKReauthThreshold;
451 
452 	/**
453 	 * dot11RSNAConfigSATimeout - Security association timeout
454 	 *
455 	 * dot11 MIB variable for the maximum time a security association
456 	 * shall take to set up (unit: seconds).
457 	 */
458 	unsigned int dot11RSNAConfigSATimeout;
459 
460 	/**
461 	 * update_config - Is wpa_supplicant allowed to update configuration
462 	 *
463 	 * This variable control whether wpa_supplicant is allow to re-write
464 	 * its configuration with wpa_config_write(). If this is zero,
465 	 * configuration data is only changed in memory and the external data
466 	 * is not overriden. If this is non-zero, wpa_supplicant will update
467 	 * the configuration data (e.g., a file) whenever configuration is
468 	 * changed. This update may replace the old configuration which can
469 	 * remove comments from it in case of a text file configuration.
470 	 */
471 	int update_config;
472 
473 	/**
474 	 * blobs - Configuration blobs
475 	 */
476 	struct wpa_config_blob *blobs;
477 
478 	/**
479 	 * uuid - Universally Unique IDentifier (UUID; see RFC 4122) for WPS
480 	 */
481 	u8 uuid[16];
482 
483 	/**
484 	 * device_name - Device Name (WPS)
485 	 * User-friendly description of device; up to 32 octets encoded in
486 	 * UTF-8
487 	 */
488 	char *device_name;
489 
490 	/**
491 	 * manufacturer - Manufacturer (WPS)
492 	 * The manufacturer of the device (up to 64 ASCII characters)
493 	 */
494 	char *manufacturer;
495 
496 	/**
497 	 * model_name - Model Name (WPS)
498 	 * Model of the device (up to 32 ASCII characters)
499 	 */
500 	char *model_name;
501 
502 	/**
503 	 * model_number - Model Number (WPS)
504 	 * Additional device description (up to 32 ASCII characters)
505 	 */
506 	char *model_number;
507 
508 	/**
509 	 * serial_number - Serial Number (WPS)
510 	 * Serial number of the device (up to 32 characters)
511 	 */
512 	char *serial_number;
513 
514 	/**
515 	 * device_type - Primary Device Type (WPS)
516 	 */
517 	u8 device_type[WPS_DEV_TYPE_LEN];
518 
519 	/**
520 	 * config_methods - Config Methods
521 	 *
522 	 * This is a space-separated list of supported WPS configuration
523 	 * methods. For example, "label virtual_display virtual_push_button
524 	 * keypad".
525 	 * Available methods: usba ethernet label display ext_nfc_token
526 	 * int_nfc_token nfc_interface push_button keypad
527 	 * virtual_display physical_display
528 	 * virtual_push_button physical_push_button.
529 	 */
530 	char *config_methods;
531 
532 	/**
533 	 * os_version - OS Version (WPS)
534 	 * 4-octet operating system version number
535 	 */
536 	u8 os_version[4];
537 
538 	/**
539 	 * country - Country code
540 	 *
541 	 * This is the ISO/IEC alpha2 country code for which we are operating
542 	 * in
543 	 */
544 	char country[2];
545 
546 	/**
547 	 * wps_cred_processing - Credential processing
548 	 *
549 	 *   0 = process received credentials internally
550 	 *   1 = do not process received credentials; just pass them over
551 	 *	ctrl_iface to external program(s)
552 	 *   2 = process received credentials internally and pass them over
553 	 *	ctrl_iface to external program(s)
554 	 */
555 	int wps_cred_processing;
556 
557 #define MAX_SEC_DEVICE_TYPES 5
558 	/**
559 	 * sec_device_types - Secondary Device Types (P2P)
560 	 */
561 	u8 sec_device_type[MAX_SEC_DEVICE_TYPES][WPS_DEV_TYPE_LEN];
562 	int num_sec_device_types;
563 
564 	int p2p_listen_reg_class;
565 	int p2p_listen_channel;
566 	int p2p_oper_reg_class;
567 	int p2p_oper_channel;
568 	int p2p_go_intent;
569 	char *p2p_ssid_postfix;
570 	int persistent_reconnect;
571 	int p2p_intra_bss;
572 	unsigned int num_p2p_pref_chan;
573 	struct p2p_channel *p2p_pref_chan;
574 	int p2p_ignore_shared_freq;
575 
576 	struct wpabuf *wps_vendor_ext_m1;
577 
578 #define MAX_WPS_VENDOR_EXT 10
579 	/**
580 	 * wps_vendor_ext - Vendor extension attributes in WPS
581 	 */
582 	struct wpabuf *wps_vendor_ext[MAX_WPS_VENDOR_EXT];
583 
584 	/**
585 	 * p2p_group_idle - Maximum idle time in seconds for P2P group
586 	 *
587 	 * This value controls how long a P2P group is maintained after there
588 	 * is no other members in the group. As a GO, this means no associated
589 	 * stations in the group. As a P2P client, this means no GO seen in
590 	 * scan results. The maximum idle time is specified in seconds with 0
591 	 * indicating no time limit, i.e., the P2P group remains in active
592 	 * state indefinitely until explicitly removed. As a P2P client, the
593 	 * maximum idle time of P2P_MAX_CLIENT_IDLE seconds is enforced, i.e.,
594 	 * this parameter is mainly meant for GO use and for P2P client, it can
595 	 * only be used to reduce the default timeout to smaller value. A
596 	 * special value -1 can be used to configure immediate removal of the
597 	 * group for P2P client role on any disconnection after the data
598 	 * connection has been established.
599 	 */
600 	int p2p_group_idle;
601 
602 	/**
603 	 * bss_max_count - Maximum number of BSS entries to keep in memory
604 	 */
605 	unsigned int bss_max_count;
606 
607 	/**
608 	 * bss_expiration_age - BSS entry age after which it can be expired
609 	 *
610 	 * This value controls the time in seconds after which a BSS entry
611 	 * gets removed if it has not been updated or is not in use.
612 	 */
613 	unsigned int bss_expiration_age;
614 
615 	/**
616 	 * bss_expiration_scan_count - Expire BSS after number of scans
617 	 *
618 	 * If the BSS entry has not been seen in this many scans, it will be
619 	 * removed. A value of 1 means that entry is removed after the first
620 	 * scan in which the BSSID is not seen. Larger values can be used
621 	 * to avoid BSS entries disappearing if they are not visible in
622 	 * every scan (e.g., low signal quality or interference).
623 	 */
624 	unsigned int bss_expiration_scan_count;
625 
626 	/**
627 	 * filter_ssids - SSID-based scan result filtering
628 	 *
629 	 *   0 = do not filter scan results
630 	 *   1 = only include configured SSIDs in scan results/BSS table
631 	 */
632 	int filter_ssids;
633 
634 	/**
635 	 * filter_rssi - RSSI-based scan result filtering
636 	 *
637 	 * 0 = do not filter scan results
638 	 * -n = filter scan results below -n dBm
639 	 */
640 	int filter_rssi;
641 
642 	/**
643 	 * max_num_sta - Maximum number of STAs in an AP/P2P GO
644 	 */
645 	unsigned int max_num_sta;
646 
647 	/**
648 	 * changed_parameters - Bitmap of changed parameters since last update
649 	 */
650 	unsigned int changed_parameters;
651 
652 	/**
653 	 * disassoc_low_ack - Disassocicate stations with massive packet loss
654 	 */
655 	int disassoc_low_ack;
656 
657 	/**
658 	 * interworking - Whether Interworking (IEEE 802.11u) is enabled
659 	 */
660 	int interworking;
661 
662 	/**
663 	 * access_network_type - Access Network Type
664 	 *
665 	 * When Interworking is enabled, scans will be limited to APs that
666 	 * advertise the specified Access Network Type (0..15; with 15
667 	 * indicating wildcard match).
668 	 */
669 	int access_network_type;
670 
671 	/**
672 	 * hessid - Homogenous ESS identifier
673 	 *
674 	 * If this is set (any octet is non-zero), scans will be used to
675 	 * request response only from BSSes belonging to the specified
676 	 * Homogeneous ESS. This is used only if interworking is enabled.
677 	 */
678 	u8 hessid[ETH_ALEN];
679 
680 	/**
681 	 * hs20 - Hotspot 2.0
682 	 */
683 	int hs20;
684 
685 	/**
686 	 * pbc_in_m1 - AP mode WPS probing workaround for PBC with Windows 7
687 	 *
688 	 * Windows 7 uses incorrect way of figuring out AP's WPS capabilities
689 	 * by acting as a Registrar and using M1 from the AP. The config
690 	 * methods attribute in that message is supposed to indicate only the
691 	 * configuration method supported by the AP in Enrollee role, i.e., to
692 	 * add an external Registrar. For that case, PBC shall not be used and
693 	 * as such, the PushButton config method is removed from M1 by default.
694 	 * If pbc_in_m1=1 is included in the configuration file, the PushButton
695 	 * config method is left in M1 (if included in config_methods
696 	 * parameter) to allow Windows 7 to use PBC instead of PIN (e.g., from
697 	 * a label in the AP).
698 	 */
699 	int pbc_in_m1;
700 
701 	/**
702 	 * autoscan - Automatic scan parameters or %NULL if none
703 	 *
704 	 * This is an optional set of parameters for automatic scanning
705 	 * within an interface in following format:
706 	 * <autoscan module name>:<module parameters>
707 	 */
708 	char *autoscan;
709 
710 	/**
711 	 * wps_nfc_pw_from_config - NFC Device Password was read from config
712 	 *
713 	 * This parameter can be determined whether the NFC Device Password was
714 	 * included in the configuration (1) or generated dynamically (0). Only
715 	 * the former case is re-written back to the configuration file.
716 	 */
717 	int wps_nfc_pw_from_config;
718 
719 	/**
720 	 * wps_nfc_dev_pw_id - NFC Device Password ID for password token
721 	 */
722 	int wps_nfc_dev_pw_id;
723 
724 	/**
725 	 * wps_nfc_dh_pubkey - NFC DH Public Key for password token
726 	 */
727 	struct wpabuf *wps_nfc_dh_pubkey;
728 
729 	/**
730 	 * wps_nfc_dh_privkey - NFC DH Private Key for password token
731 	 */
732 	struct wpabuf *wps_nfc_dh_privkey;
733 
734 	/**
735 	 * wps_nfc_dev_pw - NFC Device Password for password token
736 	 */
737 	struct wpabuf *wps_nfc_dev_pw;
738 
739 	/**
740 	 * ext_password_backend - External password backend or %NULL if none
741 	 *
742 	 * format: <backend name>[:<optional backend parameters>]
743 	 */
744 	char *ext_password_backend;
745 
746 	/*
747 	 * p2p_go_max_inactivity - Timeout in seconds to detect STA inactivity
748 	 *
749 	 * This timeout value is used in P2P GO mode to clean up
750 	 * inactive stations.
751 	 * By default: 300 seconds.
752 	 */
753 	int p2p_go_max_inactivity;
754 
755 	struct hostapd_wmm_ac_params wmm_ac_params[4];
756 
757 	/**
758 	 * auto_interworking - Whether to use network selection automatically
759 	 *
760 	 * 0 = do not automatically go through Interworking network selection
761 	 *     (i.e., require explicit interworking_select command for this)
762 	 * 1 = perform Interworking network selection if one or more
763 	 *     credentials have been configured and scan did not find a
764 	 *     matching network block
765 	 */
766 	int auto_interworking;
767 
768 	/**
769 	 * p2p_go_ht40 - Default mode for HT40 enable when operating as GO.
770 	 *
771 	 * This will take effect for p2p_group_add, p2p_connect, and p2p_invite.
772 	 * Note that regulatory constraints and driver capabilities are
773 	 * consulted anyway, so setting it to 1 can't do real harm.
774 	 * By default: 0 (disabled)
775 	 */
776 	int p2p_go_ht40;
777 
778 	/**
779 	 * p2p_disabled - Whether P2P operations are disabled for this interface
780 	 */
781 	int p2p_disabled;
782 
783 	/**
784 	 * p2p_no_group_iface - Whether group interfaces can be used
785 	 *
786 	 * By default, wpa_supplicant will create a separate interface for P2P
787 	 * group operations if the driver supports this. This functionality can
788 	 * be disabled by setting this parameter to 1. In that case, the same
789 	 * interface that was used for the P2P management operations is used
790 	 * also for the group operation.
791 	 */
792 	int p2p_no_group_iface;
793 
794 	/**
795 	 * okc - Whether to enable opportunistic key caching by default
796 	 *
797 	 * By default, OKC is disabled unless enabled by the per-network
798 	 * proactive_key_caching=1 parameter. okc=1 can be used to change this
799 	 * default behavior.
800 	 */
801 	int okc;
802 
803 	/**
804 	 * pmf - Whether to enable/require PMF by default
805 	 *
806 	 * By default, PMF is disabled unless enabled by the per-network
807 	 * ieee80211w=1 or ieee80211w=2 parameter. pmf=1/2 can be used to change
808 	 * this default behavior.
809 	 */
810 	enum mfp_options pmf;
811 
812 	/**
813 	 * sae_groups - Preference list of enabled groups for SAE
814 	 *
815 	 * By default (if this parameter is not set), the mandatory group 19
816 	 * (ECC group defined over a 256-bit prime order field) is preferred,
817 	 * but other groups are also enabled. If this parameter is set, the
818 	 * groups will be tried in the indicated order.
819 	 */
820 	int *sae_groups;
821 
822 	/**
823 	 * dtim_period - Default DTIM period in Beacon intervals
824 	 *
825 	 * This parameter can be used to set the default value for network
826 	 * blocks that do not specify dtim_period.
827 	 */
828 	int dtim_period;
829 
830 	/**
831 	 * beacon_int - Default Beacon interval in TU
832 	 *
833 	 * This parameter can be used to set the default value for network
834 	 * blocks that do not specify beacon_int.
835 	 */
836 	int beacon_int;
837 
838 	/**
839 	 * ap_vendor_elements: Vendor specific elements for Beacon/ProbeResp
840 	 *
841 	 * This parameter can be used to define additional vendor specific
842 	 * elements for Beacon and Probe Response frames in AP/P2P GO mode. The
843 	 * format for these element(s) is a hexdump of the raw information
844 	 * elements (id+len+payload for one or more elements).
845 	 */
846 	struct wpabuf *ap_vendor_elements;
847 
848 	/**
849 	 * ignore_old_scan_res - Ignore scan results older than request
850 	 *
851 	 * The driver may have a cache of scan results that makes it return
852 	 * information that is older than our scan trigger. This parameter can
853 	 * be used to configure such old information to be ignored instead of
854 	 * allowing it to update the internal BSS table.
855 	 */
856 	int ignore_old_scan_res;
857 };
858 
859 
860 /* Prototypes for common functions from config.c */
861 
862 void wpa_config_free(struct wpa_config *ssid);
863 void wpa_config_free_ssid(struct wpa_ssid *ssid);
864 void wpa_config_foreach_network(struct wpa_config *config,
865 				void (*func)(void *, struct wpa_ssid *),
866 				void *arg);
867 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
868 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
869 int wpa_config_remove_network(struct wpa_config *config, int id);
870 void wpa_config_set_network_defaults(struct wpa_ssid *ssid);
871 int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
872 		   int line);
873 int wpa_config_set_quoted(struct wpa_ssid *ssid, const char *var,
874 			  const char *value);
875 char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys);
876 char * wpa_config_get(struct wpa_ssid *ssid, const char *var);
877 char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var);
878 void wpa_config_update_psk(struct wpa_ssid *ssid);
879 int wpa_config_add_prio_network(struct wpa_config *config,
880 				struct wpa_ssid *ssid);
881 int wpa_config_update_prio_list(struct wpa_config *config);
882 const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
883 						   const char *name);
884 void wpa_config_set_blob(struct wpa_config *config,
885 			 struct wpa_config_blob *blob);
886 void wpa_config_free_blob(struct wpa_config_blob *blob);
887 int wpa_config_remove_blob(struct wpa_config *config, const char *name);
888 
889 struct wpa_cred * wpa_config_get_cred(struct wpa_config *config, int id);
890 struct wpa_cred * wpa_config_add_cred(struct wpa_config *config);
891 int wpa_config_remove_cred(struct wpa_config *config, int id);
892 void wpa_config_free_cred(struct wpa_cred *cred);
893 int wpa_config_set_cred(struct wpa_cred *cred, const char *var,
894 			const char *value, int line);
895 
896 struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
897 					   const char *driver_param);
898 #ifndef CONFIG_NO_STDOUT_DEBUG
899 void wpa_config_debug_dump_networks(struct wpa_config *config);
900 #else /* CONFIG_NO_STDOUT_DEBUG */
901 #define wpa_config_debug_dump_networks(c) do { } while (0)
902 #endif /* CONFIG_NO_STDOUT_DEBUG */
903 
904 
905 /* Prototypes for common functions from config.c */
906 int wpa_config_process_global(struct wpa_config *config, char *pos, int line);
907 
908 
909 /* Prototypes for backend specific functions from the selected config_*.c */
910 
911 /**
912  * wpa_config_read - Read and parse configuration database
913  * @name: Name of the configuration (e.g., path and file name for the
914  * configuration file)
915  * @cfgp: Pointer to previously allocated configuration data or %NULL if none
916  * Returns: Pointer to allocated configuration data or %NULL on failure
917  *
918  * This function reads configuration data, parses its contents, and allocates
919  * data structures needed for storing configuration information. The allocated
920  * data can be freed with wpa_config_free().
921  *
922  * Each configuration backend needs to implement this function.
923  */
924 struct wpa_config * wpa_config_read(const char *name, struct wpa_config *cfgp);
925 
926 /**
927  * wpa_config_write - Write or update configuration data
928  * @name: Name of the configuration (e.g., path and file name for the
929  * configuration file)
930  * @config: Configuration data from wpa_config_read()
931  * Returns: 0 on success, -1 on failure
932  *
933  * This function write all configuration data into an external database (e.g.,
934  * a text file) in a format that can be read with wpa_config_read(). This can
935  * be used to allow wpa_supplicant to update its configuration, e.g., when a
936  * new network is added or a password is changed.
937  *
938  * Each configuration backend needs to implement this function.
939  */
940 int wpa_config_write(const char *name, struct wpa_config *config);
941 
942 #endif /* CONFIG_H */
943