hostap/wpa_supplicant/config.h

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/*
* WPA Supplicant / Configuration file structures
* Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef CONFIG_H
#define CONFIG_H
#define DEFAULT_EAPOL_VERSION 1
#ifdef CONFIG_NO_SCAN_PROCESSING
#define DEFAULT_AP_SCAN 2
#else /* CONFIG_NO_SCAN_PROCESSING */
#define DEFAULT_AP_SCAN 1
#endif /* CONFIG_NO_SCAN_PROCESSING */
#define DEFAULT_FAST_REAUTH 1
#define DEFAULT_P2P_GO_INTENT 7
#define DEFAULT_P2P_INTRA_BSS 1
#define DEFAULT_P2P_GO_MAX_INACTIVITY (5 * 60)
#define DEFAULT_BSS_MAX_COUNT 200
#define DEFAULT_BSS_EXPIRATION_AGE 180
#define DEFAULT_BSS_EXPIRATION_SCAN_COUNT 2
#define DEFAULT_MAX_NUM_STA 128
#define DEFAULT_ACCESS_NETWORK_TYPE 15
#include "config_ssid.h"
#include "wps/wps.h"
#include "common/ieee802_11_common.h"
struct wpa_cred {
/**
* next - Next credential in the list
*
* This pointer can be used to iterate over all credentials. The head
* of this list is stored in the cred field of struct wpa_config.
*/
struct wpa_cred *next;
/**
* id - Unique id for the credential
*
* This identifier is used as a unique identifier for each credential
* block when using the control interface. Each credential is allocated
* an id when it is being created, either when reading the
* configuration file or when a new credential is added through the
* control interface.
*/
int id;
/**
* priority - Priority group
*
* By default, all networks and credentials get the same priority group
* (0). This field can be used to give higher priority for credentials
* (and similarly in struct wpa_ssid for network blocks) to change the
* Interworking automatic networking selection behavior. The matching
* network (based on either an enabled network block or a credential)
* with the highest priority value will be selected.
*/
int priority;
/**
* pcsc - Use PC/SC and SIM/USIM card
*/
int pcsc;
/**
* realm - Home Realm for Interworking
*/
char *realm;
/**
* username - Username for Interworking network selection
*/
char *username;
/**
* password - Password for Interworking network selection
*/
char *password;
/**
* ext_password - Whether password is a name for external storage
*/
int ext_password;
/**
* ca_cert - CA certificate for Interworking network selection
*/
char *ca_cert;
/**
* client_cert - File path to client certificate file (PEM/DER)
*
* This field is used with Interworking networking selection for a case
* where client certificate/private key is used for authentication
* (EAP-TLS). Full path to the file should be used since working
* directory may change when wpa_supplicant is run in the background.
*
* Alternatively, a named configuration blob can be used by setting
* this to blob://blob_name.
*/
char *client_cert;
/**
* private_key - File path to client private key file (PEM/DER/PFX)
*
* When PKCS#12/PFX file (.p12/.pfx) is used, client_cert should be
* commented out. Both the private key and certificate will be read
* from the PKCS#12 file in this case. Full path to the file should be
* used since working directory may change when wpa_supplicant is run
* in the background.
*
* Windows certificate store can be used by leaving client_cert out and
* configuring private_key in one of the following formats:
*
* cert://substring_to_match
*
* hash://certificate_thumbprint_in_hex
*
* For example: private_key="hash://63093aa9c47f56ae88334c7b65a4"
*
* Note that when running wpa_supplicant as an application, the user
* certificate store (My user account) is used, whereas computer store
* (Computer account) is used when running wpasvc as a service.
*
* Alternatively, a named configuration blob can be used by setting
* this to blob://blob_name.
*/
char *private_key;
/**
* private_key_passwd - Password for private key file
*/
char *private_key_passwd;
/**
* imsi - IMSI in <MCC> | <MNC> | '-' | <MSIN> format
*/
char *imsi;
/**
* milenage - Milenage parameters for SIM/USIM simulator in
* <Ki>:<OPc>:<SQN> format
*/
char *milenage;
/**
* domain - Home service provider FQDN
*
* This is used to compare against the Domain Name List to figure out
* whether the AP is operated by the Home SP.
*/
char *domain;
/**
* roaming_consortium - Roaming Consortium OI
*
* If roaming_consortium_len is non-zero, this field contains the
* Roaming Consortium OI that can be used to determine which access
* points support authentication with this credential. This is an
* alternative to the use of the realm parameter. When using Roaming
* Consortium to match the network, the EAP parameters need to be
* pre-configured with the credential since the NAI Realm information
* may not be available or fetched.
*/
u8 roaming_consortium[15];
/**
* roaming_consortium_len - Length of roaming_consortium
*/
size_t roaming_consortium_len;
/**
* eap_method - EAP method to use
*
* Pre-configured EAP method to use with this credential or %NULL to
* indicate no EAP method is selected, i.e., the method will be
* selected automatically based on ANQP information.
*/
struct eap_method_type *eap_method;
/**
* phase1 - Phase 1 (outer authentication) parameters
*
* Pre-configured EAP parameters or %NULL.
*/
char *phase1;
/**
* phase2 - Phase 2 (inner authentication) parameters
*
* Pre-configured EAP parameters or %NULL.
*/
char *phase2;
};
#define CFG_CHANGED_DEVICE_NAME BIT(0)
#define CFG_CHANGED_CONFIG_METHODS BIT(1)
#define CFG_CHANGED_DEVICE_TYPE BIT(2)
#define CFG_CHANGED_OS_VERSION BIT(3)
#define CFG_CHANGED_UUID BIT(4)
#define CFG_CHANGED_COUNTRY BIT(5)
#define CFG_CHANGED_SEC_DEVICE_TYPE BIT(6)
#define CFG_CHANGED_P2P_SSID_POSTFIX BIT(7)
#define CFG_CHANGED_WPS_STRING BIT(8)
#define CFG_CHANGED_P2P_INTRA_BSS BIT(9)
#define CFG_CHANGED_VENDOR_EXTENSION BIT(10)
#define CFG_CHANGED_P2P_LISTEN_CHANNEL BIT(11)
#define CFG_CHANGED_P2P_OPER_CHANNEL BIT(12)
#define CFG_CHANGED_P2P_PREF_CHAN BIT(13)
#define CFG_CHANGED_EXT_PW_BACKEND BIT(14)
/**
* struct wpa_config - wpa_supplicant configuration data
*
* This data structure is presents the per-interface (radio) configuration
* data. In many cases, there is only one struct wpa_config instance, but if
* more than one network interface is being controlled, one instance is used
* for each.
*/
struct wpa_config {
/**
* ssid - Head of the global network list
*
* This is the head for the list of all the configured networks.
*/
struct wpa_ssid *ssid;
/**
* pssid - Per-priority network lists (in priority order)
*/
struct wpa_ssid **pssid;
/**
* num_prio - Number of different priorities used in the pssid lists
*
* This indicates how many per-priority network lists are included in
* pssid.
*/
int num_prio;
/**
* cred - Head of the credential list
*
* This is the head for the list of all the configured credentials.
*/
struct wpa_cred *cred;
/**
* eapol_version - IEEE 802.1X/EAPOL version number
*
* wpa_supplicant is implemented based on IEEE Std 802.1X-2004 which
* defines EAPOL version 2. However, there are many APs that do not
* handle the new version number correctly (they seem to drop the
* frames completely). In order to make wpa_supplicant interoperate
* with these APs, the version number is set to 1 by default. This
* configuration value can be used to set it to the new version (2).
*/
int eapol_version;
/**
* ap_scan - AP scanning/selection
*
* By default, wpa_supplicant requests driver to perform AP
* scanning and then uses the scan results to select a
* suitable AP. Another alternative is to allow the driver to
* take care of AP scanning and selection and use
* wpa_supplicant just to process EAPOL frames based on IEEE
* 802.11 association information from the driver.
*
* 1: wpa_supplicant initiates scanning and AP selection (default).
*
* 0: Driver takes care of scanning, AP selection, and IEEE 802.11
* association parameters (e.g., WPA IE generation); this mode can
* also be used with non-WPA drivers when using IEEE 802.1X mode;
* do not try to associate with APs (i.e., external program needs
* to control association). This mode must also be used when using
* wired Ethernet drivers.
*
* 2: like 0, but associate with APs using security policy and SSID
* (but not BSSID); this can be used, e.g., with ndiswrapper and NDIS
* drivers to enable operation with hidden SSIDs and optimized roaming;
* in this mode, the network blocks in the configuration are tried
* one by one until the driver reports successful association; each
* network block should have explicit security policy (i.e., only one
* option in the lists) for key_mgmt, pairwise, group, proto variables.
*/
int ap_scan;
/**
* disable_scan_offload - Disable automatic offloading of scan requests
*
* By default, %wpa_supplicant tries to offload scanning if the driver
* indicates support for this (sched_scan). This configuration
* parameter can be used to disable this offloading mechanism.
*/
int disable_scan_offload;
/**
* ctrl_interface - Parameters for the control interface
*
* If this is specified, %wpa_supplicant will open a control interface
* that is available for external programs to manage %wpa_supplicant.
* The meaning of this string depends on which control interface
* mechanism is used. For all cases, the existence of this parameter
* in configuration is used to determine whether the control interface
* is enabled.
*
* For UNIX domain sockets (default on Linux and BSD): This is a
* directory that will be created for UNIX domain sockets for listening
* to requests from external programs (CLI/GUI, etc.) for status
* information and configuration. The socket file will be named based
* on the interface name, so multiple %wpa_supplicant processes can be
* run at the same time if more than one interface is used.
* /var/run/wpa_supplicant is the recommended directory for sockets and
* by default, wpa_cli will use it when trying to connect with
* %wpa_supplicant.
*
* Access control for the control interface can be configured
* by setting the directory to allow only members of a group
* to use sockets. This way, it is possible to run
* %wpa_supplicant as root (since it needs to change network
* configuration and open raw sockets) and still allow GUI/CLI
* components to be run as non-root users. However, since the
* control interface can be used to change the network
* configuration, this access needs to be protected in many
* cases. By default, %wpa_supplicant is configured to use gid
* 0 (root). If you want to allow non-root users to use the
* control interface, add a new group and change this value to
* match with that group. Add users that should have control
* interface access to this group.
*
* When configuring both the directory and group, use following format:
* DIR=/var/run/wpa_supplicant GROUP=wheel
* DIR=/var/run/wpa_supplicant GROUP=0
* (group can be either group name or gid)
*
* For UDP connections (default on Windows): The value will be ignored.
* This variable is just used to select that the control interface is
* to be created. The value can be set to, e.g., udp
* (ctrl_interface=udp).
*
* For Windows Named Pipe: This value can be used to set the security
* descriptor for controlling access to the control interface. Security
* descriptor can be set using Security Descriptor String Format (see
* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/security_descriptor_string_format.asp).
* The descriptor string needs to be prefixed with SDDL=. For example,
* ctrl_interface=SDDL=D: would set an empty DACL (which will reject
* all connections).
*/
char *ctrl_interface;
/**
* ctrl_interface_group - Control interface group (DEPRECATED)
*
* This variable is only used for backwards compatibility. Group for
2009-01-04 14:07:54 +01:00
* UNIX domain sockets should now be specified using GROUP=group in
* ctrl_interface variable.
*/
char *ctrl_interface_group;
/**
* fast_reauth - EAP fast re-authentication (session resumption)
*
* By default, fast re-authentication is enabled for all EAP methods
* that support it. This variable can be used to disable fast
* re-authentication (by setting fast_reauth=0). Normally, there is no
* need to disable fast re-authentication.
*/
int fast_reauth;
/**
* opensc_engine_path - Path to the OpenSSL engine for opensc
*
* This is an OpenSSL specific configuration option for loading OpenSC
* engine (engine_opensc.so); if %NULL, this engine is not loaded.
*/
char *opensc_engine_path;
/**
* pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
*
* This is an OpenSSL specific configuration option for loading PKCS#11
* engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
*/
char *pkcs11_engine_path;
/**
* pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
*
* This is an OpenSSL specific configuration option for configuring
* path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
* module is not loaded.
*/
char *pkcs11_module_path;
/**
* pcsc_reader - PC/SC reader name prefix
*
* If not %NULL, PC/SC reader with a name that matches this prefix is
* initialized for SIM/USIM access. Empty string can be used to match
* the first available reader.
*/
char *pcsc_reader;
/**
* pcsc_pin - PIN for USIM, GSM SIM, and smartcards
*
* This field is used to configure PIN for SIM/USIM for EAP-SIM and
* EAP-AKA. If left out, this will be asked through control interface.
*/
char *pcsc_pin;
/**
* driver_param - Driver interface parameters
*
* This text string is passed to the selected driver interface with the
* optional struct wpa_driver_ops::set_param() handler. This can be
* used to configure driver specific options without having to add new
* driver interface functionality.
*/
char *driver_param;
/**
* dot11RSNAConfigPMKLifetime - Maximum lifetime of a PMK
*
* dot11 MIB variable for the maximum lifetime of a PMK in the PMK
* cache (unit: seconds).
*/
unsigned int dot11RSNAConfigPMKLifetime;
/**
* dot11RSNAConfigPMKReauthThreshold - PMK re-authentication threshold
*
* dot11 MIB variable for the percentage of the PMK lifetime
* that should expire before an IEEE 802.1X reauthentication occurs.
*/
unsigned int dot11RSNAConfigPMKReauthThreshold;
/**
* dot11RSNAConfigSATimeout - Security association timeout
*
* dot11 MIB variable for the maximum time a security association
* shall take to set up (unit: seconds).
*/
unsigned int dot11RSNAConfigSATimeout;
/**
* update_config - Is wpa_supplicant allowed to update configuration
*
* This variable control whether wpa_supplicant is allow to re-write
* its configuration with wpa_config_write(). If this is zero,
* configuration data is only changed in memory and the external data
* is not overriden. If this is non-zero, wpa_supplicant will update
* the configuration data (e.g., a file) whenever configuration is
* changed. This update may replace the old configuration which can
* remove comments from it in case of a text file configuration.
*/
int update_config;
/**
* blobs - Configuration blobs
*/
struct wpa_config_blob *blobs;
/**
* uuid - Universally Unique IDentifier (UUID; see RFC 4122) for WPS
*/
u8 uuid[16];
/**
* device_name - Device Name (WPS)
* User-friendly description of device; up to 32 octets encoded in
* UTF-8
*/
char *device_name;
/**
* manufacturer - Manufacturer (WPS)
* The manufacturer of the device (up to 64 ASCII characters)
*/
char *manufacturer;
/**
* model_name - Model Name (WPS)
* Model of the device (up to 32 ASCII characters)
*/
char *model_name;
/**
* model_number - Model Number (WPS)
* Additional device description (up to 32 ASCII characters)
*/
char *model_number;
/**
* serial_number - Serial Number (WPS)
* Serial number of the device (up to 32 characters)
*/
char *serial_number;
/**
* device_type - Primary Device Type (WPS)
*/
u8 device_type[WPS_DEV_TYPE_LEN];
/**
* config_methods - Config Methods
*
* This is a space-separated list of supported WPS configuration
* methods. For example, "label virtual_display virtual_push_button
* keypad".
* Available methods: usba ethernet label display ext_nfc_token
* int_nfc_token nfc_interface push_button keypad
* virtual_display physical_display
* virtual_push_button physical_push_button.
*/
char *config_methods;
/**
* os_version - OS Version (WPS)
* 4-octet operating system version number
*/
u8 os_version[4];
/**
* country - Country code
*
* This is the ISO/IEC alpha2 country code for which we are operating
* in
*/
char country[2];
/**
* wps_cred_processing - Credential processing
*
* 0 = process received credentials internally
* 1 = do not process received credentials; just pass them over
* ctrl_iface to external program(s)
* 2 = process received credentials internally and pass them over
* ctrl_iface to external program(s)
*/
int wps_cred_processing;
#define MAX_SEC_DEVICE_TYPES 5
/**
* sec_device_types - Secondary Device Types (P2P)
*/
u8 sec_device_type[MAX_SEC_DEVICE_TYPES][WPS_DEV_TYPE_LEN];
int num_sec_device_types;
int p2p_listen_reg_class;
int p2p_listen_channel;
int p2p_oper_reg_class;
int p2p_oper_channel;
int p2p_go_intent;
char *p2p_ssid_postfix;
int persistent_reconnect;
int p2p_intra_bss;
unsigned int num_p2p_pref_chan;
struct p2p_channel *p2p_pref_chan;
struct wpabuf *wps_vendor_ext_m1;
#define MAX_WPS_VENDOR_EXT 10
/**
* wps_vendor_ext - Vendor extension attributes in WPS
*/
struct wpabuf *wps_vendor_ext[MAX_WPS_VENDOR_EXT];
/**
* p2p_group_idle - Maximum idle time in seconds for P2P group
*
* This value controls how long a P2P group is maintained after there
* is no other members in the group. As a GO, this means no associated
* stations in the group. As a P2P client, this means no GO seen in
* scan results. The maximum idle time is specified in seconds with 0
* indicating no time limit, i.e., the P2P group remains in active
* state indefinitely until explicitly removed. As a P2P client, the
* maximum idle time of P2P_MAX_CLIENT_IDLE seconds is enforced, i.e.,
* this parameter is mainly meant for GO use and for P2P client, it can
* only be used to reduce the default timeout to smaller value. A
* special value -1 can be used to configure immediate removal of the
* group for P2P client role on any disconnection after the data
* connection has been established.
*/
int p2p_group_idle;
/**
* bss_max_count - Maximum number of BSS entries to keep in memory
*/
unsigned int bss_max_count;
/**
* bss_expiration_age - BSS entry age after which it can be expired
*
* This value controls the time in seconds after which a BSS entry
* gets removed if it has not been updated or is not in use.
*/
unsigned int bss_expiration_age;
/**
* bss_expiration_scan_count - Expire BSS after number of scans
*
* If the BSS entry has not been seen in this many scans, it will be
* removed. A value of 1 means that entry is removed after the first
* scan in which the BSSID is not seen. Larger values can be used
* to avoid BSS entries disappearing if they are not visible in
* every scan (e.g., low signal quality or interference).
*/
unsigned int bss_expiration_scan_count;
/**
* filter_ssids - SSID-based scan result filtering
*
* 0 = do not filter scan results
* 1 = only include configured SSIDs in scan results/BSS table
*/
int filter_ssids;
/**
* filter_rssi - RSSI-based scan result filtering
*
* 0 = do not filter scan results
* -n = filter scan results below -n dBm
*/
int filter_rssi;
/**
* max_num_sta - Maximum number of STAs in an AP/P2P GO
*/
unsigned int max_num_sta;
/**
* changed_parameters - Bitmap of changed parameters since last update
*/
unsigned int changed_parameters;
/**
2011-03-20 11:15:02 +01:00
* disassoc_low_ack - Disassocicate stations with massive packet loss
*/
int disassoc_low_ack;
/**
* interworking - Whether Interworking (IEEE 802.11u) is enabled
*/
int interworking;
/**
* access_network_type - Access Network Type
*
* When Interworking is enabled, scans will be limited to APs that
* advertise the specified Access Network Type (0..15; with 15
* indicating wildcard match).
*/
int access_network_type;
/**
* hessid - Homogenous ESS identifier
*
* If this is set (any octet is non-zero), scans will be used to
* request response only from BSSes belonging to the specified
* Homogeneous ESS. This is used only if interworking is enabled.
*/
u8 hessid[ETH_ALEN];
/**
* hs20 - Hotspot 2.0
*/
int hs20;
/**
* pbc_in_m1 - AP mode WPS probing workaround for PBC with Windows 7
*
* Windows 7 uses incorrect way of figuring out AP's WPS capabilities
* by acting as a Registrar and using M1 from the AP. The config
* methods attribute in that message is supposed to indicate only the
* configuration method supported by the AP in Enrollee role, i.e., to
* add an external Registrar. For that case, PBC shall not be used and
* as such, the PushButton config method is removed from M1 by default.
* If pbc_in_m1=1 is included in the configuration file, the PushButton
* config method is left in M1 (if included in config_methods
* parameter) to allow Windows 7 to use PBC instead of PIN (e.g., from
* a label in the AP).
*/
int pbc_in_m1;
/**
* autoscan - Automatic scan parameters or %NULL if none
*
* This is an optional set of parameters for automatic scanning
* within an interface in following format:
* <autoscan module name>:<module parameters>
*/
char *autoscan;
/**
* wps_nfc_dev_pw_id - NFC Device Password ID for password token
*/
int wps_nfc_dev_pw_id;
/**
* wps_nfc_dh_pubkey - NFC DH Public Key for password token
*/
struct wpabuf *wps_nfc_dh_pubkey;
/**
* wps_nfc_dh_pubkey - NFC DH Private Key for password token
*/
struct wpabuf *wps_nfc_dh_privkey;
/**
* wps_nfc_dh_pubkey - NFC Device Password for password token
*/
struct wpabuf *wps_nfc_dev_pw;
/**
* ext_password_backend - External password backend or %NULL if none
*
* format: <backend name>[:<optional backend parameters>]
*/
char *ext_password_backend;
/*
* p2p_go_max_inactivity - Timeout in seconds to detect STA inactivity
*
* This timeout value is used in P2P GO mode to clean up
* inactive stations.
* By default: 300 seconds.
*/
int p2p_go_max_inactivity;
struct hostapd_wmm_ac_params wmm_ac_params[4];
/**
* auto_interworking - Whether to use network selection automatically
*
* 0 = do not automatically go through Interworking network selection
* (i.e., require explicit interworking_select command for this)
* 1 = perform Interworking network selection if one or more
* credentials have been configured and scan did not find a
* matching network block
*/
int auto_interworking;
};
/* Prototypes for common functions from config.c */
void wpa_config_free(struct wpa_config *ssid);
void wpa_config_free_ssid(struct wpa_ssid *ssid);
void wpa_config_foreach_network(struct wpa_config *config,
void (*func)(void *, struct wpa_ssid *),
void *arg);
struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
int wpa_config_remove_network(struct wpa_config *config, int id);
void wpa_config_set_network_defaults(struct wpa_ssid *ssid);
int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
int line);
int wpa_config_set_quoted(struct wpa_ssid *ssid, const char *var,
const char *value);
char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys);
char * wpa_config_get(struct wpa_ssid *ssid, const char *var);
char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var);
void wpa_config_update_psk(struct wpa_ssid *ssid);
int wpa_config_add_prio_network(struct wpa_config *config,
struct wpa_ssid *ssid);
int wpa_config_update_prio_list(struct wpa_config *config);
const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
const char *name);
void wpa_config_set_blob(struct wpa_config *config,
struct wpa_config_blob *blob);
void wpa_config_free_blob(struct wpa_config_blob *blob);
int wpa_config_remove_blob(struct wpa_config *config, const char *name);
struct wpa_cred * wpa_config_get_cred(struct wpa_config *config, int id);
struct wpa_cred * wpa_config_add_cred(struct wpa_config *config);
int wpa_config_remove_cred(struct wpa_config *config, int id);
void wpa_config_free_cred(struct wpa_cred *cred);
int wpa_config_set_cred(struct wpa_cred *cred, const char *var,
const char *value, int line);
struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
const char *driver_param);
#ifndef CONFIG_NO_STDOUT_DEBUG
void wpa_config_debug_dump_networks(struct wpa_config *config);
#else /* CONFIG_NO_STDOUT_DEBUG */
#define wpa_config_debug_dump_networks(c) do { } while (0)
#endif /* CONFIG_NO_STDOUT_DEBUG */
/* Prototypes for common functions from config.c */
int wpa_config_process_global(struct wpa_config *config, char *pos, int line);
/* Prototypes for backend specific functions from the selected config_*.c */
/**
* wpa_config_read - Read and parse configuration database
* @name: Name of the configuration (e.g., path and file name for the
* configuration file)
* Returns: Pointer to allocated configuration data or %NULL on failure
*
* This function reads configuration data, parses its contents, and allocates
* data structures needed for storing configuration information. The allocated
* data can be freed with wpa_config_free().
*
* Each configuration backend needs to implement this function.
*/
struct wpa_config * wpa_config_read(const char *name);
/**
* wpa_config_write - Write or update configuration data
* @name: Name of the configuration (e.g., path and file name for the
* configuration file)
* @config: Configuration data from wpa_config_read()
* Returns: 0 on success, -1 on failure
*
* This function write all configuration data into an external database (e.g.,
* a text file) in a format that can be read with wpa_config_read(). This can
* be used to allow wpa_supplicant to update its configuration, e.g., when a
* new network is added or a password is changed.
*
* Each configuration backend needs to implement this function.
*/
int wpa_config_write(const char *name, struct wpa_config *config);
#endif /* CONFIG_H */