2 * WPA Supplicant / Configuration file structures
3 * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
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
28 #include "config_ssid.h"
30 #include "common/ieee802_11_common.h"
35 * next - Next credential in the list
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.
40 struct wpa_cred *next;
43 * id - Unique id for the credential
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
54 * priority - Priority group
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.
66 * pcsc - Use PC/SC and SIM/USIM card
71 * realm - Home Realm for Interworking
76 * username - Username for Interworking network selection
81 * password - Password for Interworking network selection
86 * ext_password - Whether password is a name for external storage
91 * ca_cert - CA certificate for Interworking network selection
96 * client_cert - File path to client certificate file (PEM/DER)
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.
103 * Alternatively, a named configuration blob can be used by setting
104 * this to blob://blob_name.
109 * private_key - File path to client private key file (PEM/DER/PFX)
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
117 * Windows certificate store can be used by leaving client_cert out and
118 * configuring private_key in one of the following formats:
120 * cert://substring_to_match
122 * hash://certificate_thumbprint_in_hex
124 * For example: private_key="hash://63093aa9c47f56ae88334c7b65a4"
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.
130 * Alternatively, a named configuration blob can be used by setting
131 * this to blob://blob_name.
136 * private_key_passwd - Password for private key file
138 char *private_key_passwd;
141 * imsi - IMSI in <MCC> | <MNC> | '-' | <MSIN> format
146 * milenage - Milenage parameters for SIM/USIM simulator in
147 * <Ki>:<OPc>:<SQN> format
152 * domain - Home service provider FQDN
154 * This is used to compare against the Domain Name List to figure out
155 * whether the AP is operated by the Home SP.
160 * roaming_consortium - Roaming Consortium OI
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.
170 u8 roaming_consortium[15];
173 * roaming_consortium_len - Length of roaming_consortium
175 size_t roaming_consortium_len;
178 * eap_method - EAP method to use
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.
184 struct eap_method_type *eap_method;
187 * phase1 - Phase 1 (outer authentication) parameters
189 * Pre-configured EAP parameters or %NULL.
194 * phase2 - Phase 2 (inner authentication) parameters
196 * Pre-configured EAP parameters or %NULL.
202 #define CFG_CHANGED_DEVICE_NAME BIT(0)
203 #define CFG_CHANGED_CONFIG_METHODS BIT(1)
204 #define CFG_CHANGED_DEVICE_TYPE BIT(2)
205 #define CFG_CHANGED_OS_VERSION BIT(3)
206 #define CFG_CHANGED_UUID BIT(4)
207 #define CFG_CHANGED_COUNTRY BIT(5)
208 #define CFG_CHANGED_SEC_DEVICE_TYPE BIT(6)
209 #define CFG_CHANGED_P2P_SSID_POSTFIX BIT(7)
210 #define CFG_CHANGED_WPS_STRING BIT(8)
211 #define CFG_CHANGED_P2P_INTRA_BSS BIT(9)
212 #define CFG_CHANGED_VENDOR_EXTENSION BIT(10)
213 #define CFG_CHANGED_P2P_LISTEN_CHANNEL BIT(11)
214 #define CFG_CHANGED_P2P_OPER_CHANNEL BIT(12)
215 #define CFG_CHANGED_P2P_PREF_CHAN BIT(13)
216 #define CFG_CHANGED_EXT_PW_BACKEND BIT(14)
219 * struct wpa_config - wpa_supplicant configuration data
221 * This data structure is presents the per-interface (radio) configuration
222 * data. In many cases, there is only one struct wpa_config instance, but if
223 * more than one network interface is being controlled, one instance is used
228 * ssid - Head of the global network list
230 * This is the head for the list of all the configured networks.
232 struct wpa_ssid *ssid;
235 * pssid - Per-priority network lists (in priority order)
237 struct wpa_ssid **pssid;
240 * num_prio - Number of different priorities used in the pssid lists
242 * This indicates how many per-priority network lists are included in
248 * cred - Head of the credential list
250 * This is the head for the list of all the configured credentials.
252 struct wpa_cred *cred;
255 * eapol_version - IEEE 802.1X/EAPOL version number
257 * wpa_supplicant is implemented based on IEEE Std 802.1X-2004 which
258 * defines EAPOL version 2. However, there are many APs that do not
259 * handle the new version number correctly (they seem to drop the
260 * frames completely). In order to make wpa_supplicant interoperate
261 * with these APs, the version number is set to 1 by default. This
262 * configuration value can be used to set it to the new version (2).
267 * ap_scan - AP scanning/selection
269 * By default, wpa_supplicant requests driver to perform AP
270 * scanning and then uses the scan results to select a
271 * suitable AP. Another alternative is to allow the driver to
272 * take care of AP scanning and selection and use
273 * wpa_supplicant just to process EAPOL frames based on IEEE
274 * 802.11 association information from the driver.
276 * 1: wpa_supplicant initiates scanning and AP selection (default).
278 * 0: Driver takes care of scanning, AP selection, and IEEE 802.11
279 * association parameters (e.g., WPA IE generation); this mode can
280 * also be used with non-WPA drivers when using IEEE 802.1X mode;
281 * do not try to associate with APs (i.e., external program needs
282 * to control association). This mode must also be used when using
283 * wired Ethernet drivers.
285 * 2: like 0, but associate with APs using security policy and SSID
286 * (but not BSSID); this can be used, e.g., with ndiswrapper and NDIS
287 * drivers to enable operation with hidden SSIDs and optimized roaming;
288 * in this mode, the network blocks in the configuration are tried
289 * one by one until the driver reports successful association; each
290 * network block should have explicit security policy (i.e., only one
291 * option in the lists) for key_mgmt, pairwise, group, proto variables.
296 * disable_scan_offload - Disable automatic offloading of scan requests
298 * By default, %wpa_supplicant tries to offload scanning if the driver
299 * indicates support for this (sched_scan). This configuration
300 * parameter can be used to disable this offloading mechanism.
302 int disable_scan_offload;
305 * ctrl_interface - Parameters for the control interface
307 * If this is specified, %wpa_supplicant will open a control interface
308 * that is available for external programs to manage %wpa_supplicant.
309 * The meaning of this string depends on which control interface
310 * mechanism is used. For all cases, the existence of this parameter
311 * in configuration is used to determine whether the control interface
314 * For UNIX domain sockets (default on Linux and BSD): This is a
315 * directory that will be created for UNIX domain sockets for listening
316 * to requests from external programs (CLI/GUI, etc.) for status
317 * information and configuration. The socket file will be named based
318 * on the interface name, so multiple %wpa_supplicant processes can be
319 * run at the same time if more than one interface is used.
320 * /var/run/wpa_supplicant is the recommended directory for sockets and
321 * by default, wpa_cli will use it when trying to connect with
324 * Access control for the control interface can be configured
325 * by setting the directory to allow only members of a group
326 * to use sockets. This way, it is possible to run
327 * %wpa_supplicant as root (since it needs to change network
328 * configuration and open raw sockets) and still allow GUI/CLI
329 * components to be run as non-root users. However, since the
330 * control interface can be used to change the network
331 * configuration, this access needs to be protected in many
332 * cases. By default, %wpa_supplicant is configured to use gid
333 * 0 (root). If you want to allow non-root users to use the
334 * control interface, add a new group and change this value to
335 * match with that group. Add users that should have control
336 * interface access to this group.
338 * When configuring both the directory and group, use following format:
339 * DIR=/var/run/wpa_supplicant GROUP=wheel
340 * DIR=/var/run/wpa_supplicant GROUP=0
341 * (group can be either group name or gid)
343 * For UDP connections (default on Windows): The value will be ignored.
344 * This variable is just used to select that the control interface is
345 * to be created. The value can be set to, e.g., udp
346 * (ctrl_interface=udp).
348 * For Windows Named Pipe: This value can be used to set the security
349 * descriptor for controlling access to the control interface. Security
350 * descriptor can be set using Security Descriptor String Format (see
351 * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/security_descriptor_string_format.asp).
352 * The descriptor string needs to be prefixed with SDDL=. For example,
353 * ctrl_interface=SDDL=D: would set an empty DACL (which will reject
356 char *ctrl_interface;
359 * ctrl_interface_group - Control interface group (DEPRECATED)
361 * This variable is only used for backwards compatibility. Group for
362 * UNIX domain sockets should now be specified using GROUP=group in
363 * ctrl_interface variable.
365 char *ctrl_interface_group;
368 * fast_reauth - EAP fast re-authentication (session resumption)
370 * By default, fast re-authentication is enabled for all EAP methods
371 * that support it. This variable can be used to disable fast
372 * re-authentication (by setting fast_reauth=0). Normally, there is no
373 * need to disable fast re-authentication.
378 * opensc_engine_path - Path to the OpenSSL engine for opensc
380 * This is an OpenSSL specific configuration option for loading OpenSC
381 * engine (engine_opensc.so); if %NULL, this engine is not loaded.
383 char *opensc_engine_path;
386 * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
388 * This is an OpenSSL specific configuration option for loading PKCS#11
389 * engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
391 char *pkcs11_engine_path;
394 * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
396 * This is an OpenSSL specific configuration option for configuring
397 * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
398 * module is not loaded.
400 char *pkcs11_module_path;
403 * pcsc_reader - PC/SC reader name prefix
405 * If not %NULL, PC/SC reader with a name that matches this prefix is
406 * initialized for SIM/USIM access. Empty string can be used to match
407 * the first available reader.
412 * pcsc_pin - PIN for USIM, GSM SIM, and smartcards
414 * This field is used to configure PIN for SIM/USIM for EAP-SIM and
415 * EAP-AKA. If left out, this will be asked through control interface.
420 * driver_param - Driver interface parameters
422 * This text string is passed to the selected driver interface with the
423 * optional struct wpa_driver_ops::set_param() handler. This can be
424 * used to configure driver specific options without having to add new
425 * driver interface functionality.
430 * dot11RSNAConfigPMKLifetime - Maximum lifetime of a PMK
432 * dot11 MIB variable for the maximum lifetime of a PMK in the PMK
433 * cache (unit: seconds).
435 unsigned int dot11RSNAConfigPMKLifetime;
438 * dot11RSNAConfigPMKReauthThreshold - PMK re-authentication threshold
440 * dot11 MIB variable for the percentage of the PMK lifetime
441 * that should expire before an IEEE 802.1X reauthentication occurs.
443 unsigned int dot11RSNAConfigPMKReauthThreshold;
446 * dot11RSNAConfigSATimeout - Security association timeout
448 * dot11 MIB variable for the maximum time a security association
449 * shall take to set up (unit: seconds).
451 unsigned int dot11RSNAConfigSATimeout;
454 * update_config - Is wpa_supplicant allowed to update configuration
456 * This variable control whether wpa_supplicant is allow to re-write
457 * its configuration with wpa_config_write(). If this is zero,
458 * configuration data is only changed in memory and the external data
459 * is not overriden. If this is non-zero, wpa_supplicant will update
460 * the configuration data (e.g., a file) whenever configuration is
461 * changed. This update may replace the old configuration which can
462 * remove comments from it in case of a text file configuration.
467 * blobs - Configuration blobs
469 struct wpa_config_blob *blobs;
472 * uuid - Universally Unique IDentifier (UUID; see RFC 4122) for WPS
477 * device_name - Device Name (WPS)
478 * User-friendly description of device; up to 32 octets encoded in
484 * manufacturer - Manufacturer (WPS)
485 * The manufacturer of the device (up to 64 ASCII characters)
490 * model_name - Model Name (WPS)
491 * Model of the device (up to 32 ASCII characters)
496 * model_number - Model Number (WPS)
497 * Additional device description (up to 32 ASCII characters)
502 * serial_number - Serial Number (WPS)
503 * Serial number of the device (up to 32 characters)
508 * device_type - Primary Device Type (WPS)
510 u8 device_type[WPS_DEV_TYPE_LEN];
513 * config_methods - Config Methods
515 * This is a space-separated list of supported WPS configuration
516 * methods. For example, "label virtual_display virtual_push_button
518 * Available methods: usba ethernet label display ext_nfc_token
519 * int_nfc_token nfc_interface push_button keypad
520 * virtual_display physical_display
521 * virtual_push_button physical_push_button.
523 char *config_methods;
526 * os_version - OS Version (WPS)
527 * 4-octet operating system version number
532 * country - Country code
534 * This is the ISO/IEC alpha2 country code for which we are operating
540 * wps_cred_processing - Credential processing
542 * 0 = process received credentials internally
543 * 1 = do not process received credentials; just pass them over
544 * ctrl_iface to external program(s)
545 * 2 = process received credentials internally and pass them over
546 * ctrl_iface to external program(s)
548 int wps_cred_processing;
550 #define MAX_SEC_DEVICE_TYPES 5
552 * sec_device_types - Secondary Device Types (P2P)
554 u8 sec_device_type[MAX_SEC_DEVICE_TYPES][WPS_DEV_TYPE_LEN];
555 int num_sec_device_types;
557 int p2p_listen_reg_class;
558 int p2p_listen_channel;
559 int p2p_oper_reg_class;
560 int p2p_oper_channel;
562 char *p2p_ssid_postfix;
563 int persistent_reconnect;
565 unsigned int num_p2p_pref_chan;
566 struct p2p_channel *p2p_pref_chan;
568 struct wpabuf *wps_vendor_ext_m1;
570 #define MAX_WPS_VENDOR_EXT 10
572 * wps_vendor_ext - Vendor extension attributes in WPS
574 struct wpabuf *wps_vendor_ext[MAX_WPS_VENDOR_EXT];
577 * p2p_group_idle - Maximum idle time in seconds for P2P group
579 * This value controls how long a P2P group is maintained after there
580 * is no other members in the group. As a GO, this means no associated
581 * stations in the group. As a P2P client, this means no GO seen in
582 * scan results. The maximum idle time is specified in seconds with 0
583 * indicating no time limit, i.e., the P2P group remains in active
584 * state indefinitely until explicitly removed. As a P2P client, the
585 * maximum idle time of P2P_MAX_CLIENT_IDLE seconds is enforced, i.e.,
586 * this parameter is mainly meant for GO use and for P2P client, it can
587 * only be used to reduce the default timeout to smaller value. A
588 * special value -1 can be used to configure immediate removal of the
589 * group for P2P client role on any disconnection after the data
590 * connection has been established.
595 * bss_max_count - Maximum number of BSS entries to keep in memory
597 unsigned int bss_max_count;
600 * bss_expiration_age - BSS entry age after which it can be expired
602 * This value controls the time in seconds after which a BSS entry
603 * gets removed if it has not been updated or is not in use.
605 unsigned int bss_expiration_age;
608 * bss_expiration_scan_count - Expire BSS after number of scans
610 * If the BSS entry has not been seen in this many scans, it will be
611 * removed. A value of 1 means that entry is removed after the first
612 * scan in which the BSSID is not seen. Larger values can be used
613 * to avoid BSS entries disappearing if they are not visible in
614 * every scan (e.g., low signal quality or interference).
616 unsigned int bss_expiration_scan_count;
619 * filter_ssids - SSID-based scan result filtering
621 * 0 = do not filter scan results
622 * 1 = only include configured SSIDs in scan results/BSS table
627 * filter_rssi - RSSI-based scan result filtering
629 * 0 = do not filter scan results
630 * -n = filter scan results below -n dBm
635 * max_num_sta - Maximum number of STAs in an AP/P2P GO
637 unsigned int max_num_sta;
640 * changed_parameters - Bitmap of changed parameters since last update
642 unsigned int changed_parameters;
645 * disassoc_low_ack - Disassocicate stations with massive packet loss
647 int disassoc_low_ack;
650 * interworking - Whether Interworking (IEEE 802.11u) is enabled
655 * access_network_type - Access Network Type
657 * When Interworking is enabled, scans will be limited to APs that
658 * advertise the specified Access Network Type (0..15; with 15
659 * indicating wildcard match).
661 int access_network_type;
664 * hessid - Homogenous ESS identifier
666 * If this is set (any octet is non-zero), scans will be used to
667 * request response only from BSSes belonging to the specified
668 * Homogeneous ESS. This is used only if interworking is enabled.
678 * pbc_in_m1 - AP mode WPS probing workaround for PBC with Windows 7
680 * Windows 7 uses incorrect way of figuring out AP's WPS capabilities
681 * by acting as a Registrar and using M1 from the AP. The config
682 * methods attribute in that message is supposed to indicate only the
683 * configuration method supported by the AP in Enrollee role, i.e., to
684 * add an external Registrar. For that case, PBC shall not be used and
685 * as such, the PushButton config method is removed from M1 by default.
686 * If pbc_in_m1=1 is included in the configuration file, the PushButton
687 * config method is left in M1 (if included in config_methods
688 * parameter) to allow Windows 7 to use PBC instead of PIN (e.g., from
689 * a label in the AP).
694 * autoscan - Automatic scan parameters or %NULL if none
696 * This is an optional set of parameters for automatic scanning
697 * within an interface in following format:
698 * <autoscan module name>:<module parameters>
703 * wps_nfc_dev_pw_id - NFC Device Password ID for password token
705 int wps_nfc_dev_pw_id;
708 * wps_nfc_dh_pubkey - NFC DH Public Key for password token
710 struct wpabuf *wps_nfc_dh_pubkey;
713 * wps_nfc_dh_pubkey - NFC DH Private Key for password token
715 struct wpabuf *wps_nfc_dh_privkey;
718 * wps_nfc_dh_pubkey - NFC Device Password for password token
720 struct wpabuf *wps_nfc_dev_pw;
723 * ext_password_backend - External password backend or %NULL if none
725 * format: <backend name>[:<optional backend parameters>]
727 char *ext_password_backend;
730 * p2p_go_max_inactivity - Timeout in seconds to detect STA inactivity
732 * This timeout value is used in P2P GO mode to clean up
734 * By default: 300 seconds.
736 int p2p_go_max_inactivity;
738 struct hostapd_wmm_ac_params wmm_ac_params[4];
741 * auto_interworking - Whether to use network selection automatically
743 * 0 = do not automatically go through Interworking network selection
744 * (i.e., require explicit interworking_select command for this)
745 * 1 = perform Interworking network selection if one or more
746 * credentials have been configured and scan did not find a
747 * matching network block
749 int auto_interworking;
752 * p2p_go_ht40 - Default mode for HT40 enable when operating as GO.
754 * This will take effect for p2p_group_add, p2p_connect, and p2p_invite.
755 * Note that regulatory constraints and driver capabilities are
756 * consulted anyway, so setting it to 1 can't do real harm.
757 * By default: 0 (disabled)
762 * p2p_disabled - Whether P2P operations are disabled for this interface
767 * p2p_no_group_iface - Whether group interfaces can be used
769 * By default, wpa_supplicant will create a separate interface for P2P
770 * group operations if the driver supports this. This functionality can
771 * be disabled by setting this parameter to 1. In that case, the same
772 * interface that was used for the P2P management operations is used
773 * also for the group operation.
775 int p2p_no_group_iface;
778 * okc - Whether to enable opportunistic key caching by default
780 * By default, OKC is disabled unless enabled by the per-network
781 * proactive_key_caching=1 parameter. okc=1 can be used to change this
788 /* Prototypes for common functions from config.c */
790 void wpa_config_free(struct wpa_config *ssid);
791 void wpa_config_free_ssid(struct wpa_ssid *ssid);
792 void wpa_config_foreach_network(struct wpa_config *config,
793 void (*func)(void *, struct wpa_ssid *),
795 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
796 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
797 int wpa_config_remove_network(struct wpa_config *config, int id);
798 void wpa_config_set_network_defaults(struct wpa_ssid *ssid);
799 int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
801 int wpa_config_set_quoted(struct wpa_ssid *ssid, const char *var,
803 char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys);
804 char * wpa_config_get(struct wpa_ssid *ssid, const char *var);
805 char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var);
806 void wpa_config_update_psk(struct wpa_ssid *ssid);
807 int wpa_config_add_prio_network(struct wpa_config *config,
808 struct wpa_ssid *ssid);
809 int wpa_config_update_prio_list(struct wpa_config *config);
810 const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
812 void wpa_config_set_blob(struct wpa_config *config,
813 struct wpa_config_blob *blob);
814 void wpa_config_free_blob(struct wpa_config_blob *blob);
815 int wpa_config_remove_blob(struct wpa_config *config, const char *name);
817 struct wpa_cred * wpa_config_get_cred(struct wpa_config *config, int id);
818 struct wpa_cred * wpa_config_add_cred(struct wpa_config *config);
819 int wpa_config_remove_cred(struct wpa_config *config, int id);
820 void wpa_config_free_cred(struct wpa_cred *cred);
821 int wpa_config_set_cred(struct wpa_cred *cred, const char *var,
822 const char *value, int line);
824 struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
825 const char *driver_param);
826 #ifndef CONFIG_NO_STDOUT_DEBUG
827 void wpa_config_debug_dump_networks(struct wpa_config *config);
828 #else /* CONFIG_NO_STDOUT_DEBUG */
829 #define wpa_config_debug_dump_networks(c) do { } while (0)
830 #endif /* CONFIG_NO_STDOUT_DEBUG */
833 /* Prototypes for common functions from config.c */
834 int wpa_config_process_global(struct wpa_config *config, char *pos, int line);
837 /* Prototypes for backend specific functions from the selected config_*.c */
840 * wpa_config_read - Read and parse configuration database
841 * @name: Name of the configuration (e.g., path and file name for the
842 * configuration file)
843 * Returns: Pointer to allocated configuration data or %NULL on failure
845 * This function reads configuration data, parses its contents, and allocates
846 * data structures needed for storing configuration information. The allocated
847 * data can be freed with wpa_config_free().
849 * Each configuration backend needs to implement this function.
851 struct wpa_config * wpa_config_read(const char *name);
854 * wpa_config_write - Write or update configuration data
855 * @name: Name of the configuration (e.g., path and file name for the
856 * configuration file)
857 * @config: Configuration data from wpa_config_read()
858 * Returns: 0 on success, -1 on failure
860 * This function write all configuration data into an external database (e.g.,
861 * a text file) in a format that can be read with wpa_config_read(). This can
862 * be used to allow wpa_supplicant to update its configuration, e.g., when a
863 * new network is added or a password is changed.
865 * Each configuration backend needs to implement this function.
867 int wpa_config_write(const char *name, struct wpa_config *config);
869 #endif /* CONFIG_H */