wpa_supplicant/config.h

   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_BSS_MAX_COUNT 200
  22 #define DEFAULT_BSS_EXPIRATION_AGE 180
  23 #define DEFAULT_BSS_EXPIRATION_SCAN_COUNT 2
  24 #define DEFAULT_MAX_NUM_STA 128
  25 #define DEFAULT_ACCESS_NETWORK_TYPE 15
  26
  27 #include "config_ssid.h"
  28 #include "wps/wps.h"
  29
  30
  31 struct wpa_cred {
  32         /**
  33          * next - Next credential in the list
  34          *
  35          * This pointer can be used to iterate over all credentials. The head
  36          * of this list is stored in the cred field of struct wpa_config.
  37          */
  38         struct wpa_cred *next;
  39
  40         /**
  41          * id - Unique id for the credential
  42          *
  43          * This identifier is used as a unique identifier for each credential
  44          * block when using the control interface. Each credential is allocated
  45          * an id when it is being created, either when reading the
  46          * configuration file or when a new credential is added through the
  47          * control interface.
  48          */
  49         int id;
  50
  51         /**
  52          * priority - Priority group
  53          *
  54          * By default, all networks and credentials get the same priority group
  55          * (0). This field can be used to give higher priority for credentials
  56          * (and similarly in struct wpa_ssid for network blocks) to change the
  57          * Interworking automatic networking selection behavior. The matching
  58          * network (based on either an enabled network block or a credential)
  59          * with the highest priority value will be selected.
  60          */
  61         int priority;
  62
  63         /**
  64          * pcsc - Use PC/SC and SIM/USIM card
  65          */
  66         int pcsc;
  67
  68         /**
  69          * realm - Home Realm for Interworking
  70          */
  71         char *realm;
  72
  73         /**
  74          * username - Username for Interworking network selection
  75          */
  76         char *username;
  77
  78         /**
  79          * password - Password for Interworking network selection
  80          */
  81         char *password;
  82
  83         /**
  84          * ca_cert - CA certificate for Interworking network selection
  85          */
  86         char *ca_cert;
  87
  88         /**
  89          * client_cert - File path to client certificate file (PEM/DER)
  90          *
  91          * This field is used with Interworking networking selection for a case
  92          * where client certificate/private key is used for authentication
  93          * (EAP-TLS). Full path to the file should be used since working
  94          * directory may change when wpa_supplicant is run in the background.
  95          *
  96          * Alternatively, a named configuration blob can be used by setting
  97          * this to blob://blob_name.
  98          */
  99         char *client_cert;
 100
 101         /**
 102          * private_key - File path to client private key file (PEM/DER/PFX)
 103          *
 104          * When PKCS#12/PFX file (.p12/.pfx) is used, client_cert should be
 105          * commented out. Both the private key and certificate will be read
 106          * from the PKCS#12 file in this case. Full path to the file should be
 107          * used since working directory may change when wpa_supplicant is run
 108          * in the background.
 109          *
 110          * Windows certificate store can be used by leaving client_cert out and
 111          * configuring private_key in one of the following formats:
 112          *
 113          * cert://substring_to_match
 114          *
 115          * hash://certificate_thumbprint_in_hex
 116          *
 117          * For example: private_key="hash://63093aa9c47f56ae88334c7b65a4"
 118          *
 119          * Note that when running wpa_supplicant as an application, the user
 120          * certificate store (My user account) is used, whereas computer store
 121          * (Computer account) is used when running wpasvc as a service.
 122          *
 123          * Alternatively, a named configuration blob can be used by setting
 124          * this to blob://blob_name.
 125          */
 126         char *private_key;
 127
 128         /**
 129          * private_key_passwd - Password for private key file
 130          */
 131         char *private_key_passwd;
 132
 133         /**
 134          * imsi - IMSI in <MCC> | <MNC> | '-' | <MSIN> format
 135          */
 136         char *imsi;
 137
 138         /**
 139          * milenage - Milenage parameters for SIM/USIM simulator in
 140          *      <Ki>:<OPc>:<SQN> format
 141          */
 142         char *milenage;
 143
 144         /**
 145          * domain - Home service provider FQDN
 146          *
 147          * This is used to compare against the Domain Name List to figure out
 148          * whether the AP is operated by the Home SP.
 149          */
 150         char *domain;
 151 };
 152
 153
 154 #define CFG_CHANGED_DEVICE_NAME BIT(0)
 155 #define CFG_CHANGED_CONFIG_METHODS BIT(1)
 156 #define CFG_CHANGED_DEVICE_TYPE BIT(2)
 157 #define CFG_CHANGED_OS_VERSION BIT(3)
 158 #define CFG_CHANGED_UUID BIT(4)
 159 #define CFG_CHANGED_COUNTRY BIT(5)
 160 #define CFG_CHANGED_SEC_DEVICE_TYPE BIT(6)
 161 #define CFG_CHANGED_P2P_SSID_POSTFIX BIT(7)
 162 #define CFG_CHANGED_WPS_STRING BIT(8)
 163 #define CFG_CHANGED_P2P_INTRA_BSS BIT(9)
 164 #define CFG_CHANGED_VENDOR_EXTENSION BIT(10)
 165 #define CFG_CHANGED_P2P_LISTEN_CHANNEL BIT(11)
 166 #define CFG_CHANGED_P2P_OPER_CHANNEL BIT(12)
 167 #define CFG_CHANGED_P2P_PREF_CHAN BIT(13)
 168
 169 /**
 170  * struct wpa_config - wpa_supplicant configuration data
 171  *
 172  * This data structure is presents the per-interface (radio) configuration
 173  * data. In many cases, there is only one struct wpa_config instance, but if
 174  * more than one network interface is being controlled, one instance is used
 175  * for each.
 176  */
 177 struct wpa_config {
 178         /**
 179          * ssid - Head of the global network list
 180          *
 181          * This is the head for the list of all the configured networks.
 182          */
 183         struct wpa_ssid *ssid;
 184
 185         /**
 186          * pssid - Per-priority network lists (in priority order)
 187          */
 188         struct wpa_ssid **pssid;
 189
 190         /**
 191          * num_prio - Number of different priorities used in the pssid lists
 192          *
 193          * This indicates how many per-priority network lists are included in
 194          * pssid.
 195          */
 196         int num_prio;
 197
 198         /**
 199          * cred - Head of the credential list
 200          *
 201          * This is the head for the list of all the configured credentials.
 202          */
 203         struct wpa_cred *cred;
 204
 205         /**
 206          * eapol_version - IEEE 802.1X/EAPOL version number
 207          *
 208          * wpa_supplicant is implemented based on IEEE Std 802.1X-2004 which
 209          * defines EAPOL version 2. However, there are many APs that do not
 210          * handle the new version number correctly (they seem to drop the
 211          * frames completely). In order to make wpa_supplicant interoperate
 212          * with these APs, the version number is set to 1 by default. This
 213          * configuration value can be used to set it to the new version (2).
 214          */
 215         int eapol_version;
 216
 217         /**
 218          * ap_scan - AP scanning/selection
 219          *
 220          * By default, wpa_supplicant requests driver to perform AP
 221          * scanning and then uses the scan results to select a
 222          * suitable AP. Another alternative is to allow the driver to
 223          * take care of AP scanning and selection and use
 224          * wpa_supplicant just to process EAPOL frames based on IEEE
 225          * 802.11 association information from the driver.
 226          *
 227          * 1: wpa_supplicant initiates scanning and AP selection (default).
 228          *
 229          * 0: Driver takes care of scanning, AP selection, and IEEE 802.11
 230          * association parameters (e.g., WPA IE generation); this mode can
 231          * also be used with non-WPA drivers when using IEEE 802.1X mode;
 232          * do not try to associate with APs (i.e., external program needs
 233          * to control association). This mode must also be used when using
 234          * wired Ethernet drivers.
 235          *
 236          * 2: like 0, but associate with APs using security policy and SSID
 237          * (but not BSSID); this can be used, e.g., with ndiswrapper and NDIS
 238          * drivers to enable operation with hidden SSIDs and optimized roaming;
 239          * in this mode, the network blocks in the configuration are tried
 240          * one by one until the driver reports successful association; each
 241          * network block should have explicit security policy (i.e., only one
 242          * option in the lists) for key_mgmt, pairwise, group, proto variables.
 243          */
 244         int ap_scan;
 245
 246         /**
 247          * ctrl_interface - Parameters for the control interface
 248          *
 249          * If this is specified, %wpa_supplicant will open a control interface
 250          * that is available for external programs to manage %wpa_supplicant.
 251          * The meaning of this string depends on which control interface
 252          * mechanism is used. For all cases, the existence of this parameter
 253          * in configuration is used to determine whether the control interface
 254          * is enabled.
 255          *
 256          * For UNIX domain sockets (default on Linux and BSD): This is a
 257          * directory that will be created for UNIX domain sockets for listening
 258          * to requests from external programs (CLI/GUI, etc.) for status
 259          * information and configuration. The socket file will be named based
 260          * on the interface name, so multiple %wpa_supplicant processes can be
 261          * run at the same time if more than one interface is used.
 262          * /var/run/wpa_supplicant is the recommended directory for sockets and
 263          * by default, wpa_cli will use it when trying to connect with
 264          * %wpa_supplicant.
 265          *
 266          * Access control for the control interface can be configured
 267          * by setting the directory to allow only members of a group
 268          * to use sockets. This way, it is possible to run
 269          * %wpa_supplicant as root (since it needs to change network
 270          * configuration and open raw sockets) and still allow GUI/CLI
 271          * components to be run as non-root users. However, since the
 272          * control interface can be used to change the network
 273          * configuration, this access needs to be protected in many
 274          * cases. By default, %wpa_supplicant is configured to use gid
 275          * 0 (root). If you want to allow non-root users to use the
 276          * control interface, add a new group and change this value to
 277          * match with that group. Add users that should have control
 278          * interface access to this group.
 279          *
 280          * When configuring both the directory and group, use following format:
 281          * DIR=/var/run/wpa_supplicant GROUP=wheel
 282          * DIR=/var/run/wpa_supplicant GROUP=0
 283          * (group can be either group name or gid)
 284          *
 285          * For UDP connections (default on Windows): The value will be ignored.
 286          * This variable is just used to select that the control interface is
 287          * to be created. The value can be set to, e.g., udp
 288          * (ctrl_interface=udp).
 289          *
 290          * For Windows Named Pipe: This value can be used to set the security
 291          * descriptor for controlling access to the control interface. Security
 292          * descriptor can be set using Security Descriptor String Format (see
 293          * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/security_descriptor_string_format.asp).
 294          * The descriptor string needs to be prefixed with SDDL=. For example,
 295          * ctrl_interface=SDDL=D: would set an empty DACL (which will reject
 296          * all connections).
 297          */
 298         char *ctrl_interface;
 299
 300         /**
 301          * ctrl_interface_group - Control interface group (DEPRECATED)
 302          *
 303          * This variable is only used for backwards compatibility. Group for
 304          * UNIX domain sockets should now be specified using GROUP=group in
 305          * ctrl_interface variable.
 306          */
 307         char *ctrl_interface_group;
 308
 309         /**
 310          * fast_reauth - EAP fast re-authentication (session resumption)
 311          *
 312          * By default, fast re-authentication is enabled for all EAP methods
 313          * that support it. This variable can be used to disable fast
 314          * re-authentication (by setting fast_reauth=0). Normally, there is no
 315          * need to disable fast re-authentication.
 316          */
 317         int fast_reauth;
 318
 319         /**
 320          * opensc_engine_path - Path to the OpenSSL engine for opensc
 321          *
 322          * This is an OpenSSL specific configuration option for loading OpenSC
 323          * engine (engine_opensc.so); if %NULL, this engine is not loaded.
 324          */
 325         char *opensc_engine_path;
 326
 327         /**
 328          * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
 329          *
 330          * This is an OpenSSL specific configuration option for loading PKCS#11
 331          * engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
 332          */
 333         char *pkcs11_engine_path;
 334
 335         /**
 336          * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
 337          *
 338          * This is an OpenSSL specific configuration option for configuring
 339          * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
 340          * module is not loaded.
 341          */
 342         char *pkcs11_module_path;
 343
 344         /**
 345          * pcsc_reader - PC/SC reader name prefix
 346          *
 347          * If not %NULL, PC/SC reader with a name that matches this prefix is
 348          * initialized for SIM/USIM access. Empty string can be used to match
 349          * the first available reader.
 350          */
 351         char *pcsc_reader;
 352
 353         /**
 354          * pcsc_pin - PIN for USIM, GSM SIM, and smartcards
 355          *
 356          * This field is used to configure PIN for SIM/USIM for EAP-SIM and
 357          * EAP-AKA. If left out, this will be asked through control interface.
 358          */
 359         char *pcsc_pin;
 360
 361         /**
 362          * driver_param - Driver interface parameters
 363          *
 364          * This text string is passed to the selected driver interface with the
 365          * optional struct wpa_driver_ops::set_param() handler. This can be
 366          * used to configure driver specific options without having to add new
 367          * driver interface functionality.
 368          */
 369         char *driver_param;
 370
 371         /**
 372          * dot11RSNAConfigPMKLifetime - Maximum lifetime of a PMK
 373          *
 374          * dot11 MIB variable for the maximum lifetime of a PMK in the PMK
 375          * cache (unit: seconds).
 376          */
 377         unsigned int dot11RSNAConfigPMKLifetime;
 378
 379         /**
 380          * dot11RSNAConfigPMKReauthThreshold - PMK re-authentication threshold
 381          *
 382          * dot11 MIB variable for the percentage of the PMK lifetime
 383          * that should expire before an IEEE 802.1X reauthentication occurs.
 384          */
 385         unsigned int dot11RSNAConfigPMKReauthThreshold;
 386
 387         /**
 388          * dot11RSNAConfigSATimeout - Security association timeout
 389          *
 390          * dot11 MIB variable for the maximum time a security association
 391          * shall take to set up (unit: seconds).
 392          */
 393         unsigned int dot11RSNAConfigSATimeout;
 394
 395         /**
 396          * update_config - Is wpa_supplicant allowed to update configuration
 397          *
 398          * This variable control whether wpa_supplicant is allow to re-write
 399          * its configuration with wpa_config_write(). If this is zero,
 400          * configuration data is only changed in memory and the external data
 401          * is not overriden. If this is non-zero, wpa_supplicant will update
 402          * the configuration data (e.g., a file) whenever configuration is
 403          * changed. This update may replace the old configuration which can
 404          * remove comments from it in case of a text file configuration.
 405          */
 406         int update_config;
 407
 408         /**
 409          * blobs - Configuration blobs
 410          */
 411         struct wpa_config_blob *blobs;
 412
 413         /**
 414          * uuid - Universally Unique IDentifier (UUID; see RFC 4122) for WPS
 415          */
 416         u8 uuid[16];
 417
 418         /**
 419          * device_name - Device Name (WPS)
 420          * User-friendly description of device; up to 32 octets encoded in
 421          * UTF-8
 422          */
 423         char *device_name;
 424
 425         /**
 426          * manufacturer - Manufacturer (WPS)
 427          * The manufacturer of the device (up to 64 ASCII characters)
 428          */
 429         char *manufacturer;
 430
 431         /**
 432          * model_name - Model Name (WPS)
 433          * Model of the device (up to 32 ASCII characters)
 434          */
 435         char *model_name;
 436
 437         /**
 438          * model_number - Model Number (WPS)
 439          * Additional device description (up to 32 ASCII characters)
 440          */
 441         char *model_number;
 442
 443         /**
 444          * serial_number - Serial Number (WPS)
 445          * Serial number of the device (up to 32 characters)
 446          */
 447         char *serial_number;
 448
 449         /**
 450          * device_type - Primary Device Type (WPS)
 451          */
 452         u8 device_type[WPS_DEV_TYPE_LEN];
 453
 454         /**
 455          * config_methods - Config Methods
 456          *
 457          * This is a space-separated list of supported WPS configuration
 458          * methods. For example, "label virtual_display virtual_push_button
 459          * keypad".
 460          * Available methods: usba ethernet label display ext_nfc_token
 461          * int_nfc_token nfc_interface push_button keypad
 462          * virtual_display physical_display
 463          * virtual_push_button physical_push_button.
 464          */
 465         char *config_methods;
 466
 467         /**
 468          * os_version - OS Version (WPS)
 469          * 4-octet operating system version number
 470          */
 471         u8 os_version[4];
 472
 473         /**
 474          * country - Country code
 475          *
 476          * This is the ISO/IEC alpha2 country code for which we are operating
 477          * in
 478          */
 479         char country[2];
 480
 481         /**
 482          * wps_cred_processing - Credential processing
 483          *
 484          *   0 = process received credentials internally
 485          *   1 = do not process received credentials; just pass them over
 486          *      ctrl_iface to external program(s)
 487          *   2 = process received credentials internally and pass them over
 488          *      ctrl_iface to external program(s)
 489          */
 490         int wps_cred_processing;
 491
 492 #define MAX_SEC_DEVICE_TYPES 5
 493         /**
 494          * sec_device_types - Secondary Device Types (P2P)
 495          */
 496         u8 sec_device_type[MAX_SEC_DEVICE_TYPES][WPS_DEV_TYPE_LEN];
 497         int num_sec_device_types;
 498
 499         int p2p_listen_reg_class;
 500         int p2p_listen_channel;
 501         int p2p_oper_reg_class;
 502         int p2p_oper_channel;
 503         int p2p_go_intent;
 504         char *p2p_ssid_postfix;
 505         int persistent_reconnect;
 506         int p2p_intra_bss;
 507         unsigned int num_p2p_pref_chan;
 508         struct p2p_channel *p2p_pref_chan;
 509
 510         struct wpabuf *wps_vendor_ext_m1;
 511
 512 #define MAX_WPS_VENDOR_EXT 10
 513         /**
 514          * wps_vendor_ext - Vendor extension attributes in WPS
 515          */
 516         struct wpabuf *wps_vendor_ext[MAX_WPS_VENDOR_EXT];
 517
 518         /**
 519          * p2p_group_idle - Maximum idle time in seconds for P2P group
 520          *
 521          * This value controls how long a P2P group is maintained after there
 522          * is no other members in the group. As a GO, this means no associated
 523          * stations in the group. As a P2P client, this means no GO seen in
 524          * scan results. The maximum idle time is specified in seconds with 0
 525          * indicating no time limit, i.e., the P2P group remains in active
 526          * state indefinitely until explicitly removed. As a P2P client, the
 527          * maximum idle time of P2P_MAX_CLIENT_IDLE seconds is enforced, i.e.,
 528          * this parameter is mainly meant for GO use and for P2P client, it can
 529          * only be used to reduce the default timeout to smaller value.
 530          */
 531         unsigned int p2p_group_idle;
 532
 533         /**
 534          * bss_max_count - Maximum number of BSS entries to keep in memory
 535          */
 536         unsigned int bss_max_count;
 537
 538         /**
 539          * bss_expiration_age - BSS entry age after which it can be expired
 540          *
 541          * This value controls the time in seconds after which a BSS entry
 542          * gets removed if it has not been updated or is not in use.
 543          */
 544         unsigned int bss_expiration_age;
 545
 546         /**
 547          * bss_expiration_scan_count - Expire BSS after number of scans
 548          *
 549          * If the BSS entry has not been seen in this many scans, it will be
 550          * removed. A value of 1 means that entry is removed after the first
 551          * scan in which the BSSID is not seen. Larger values can be used
 552          * to avoid BSS entries disappearing if they are not visible in
 553          * every scan (e.g., low signal quality or interference).
 554          */
 555         unsigned int bss_expiration_scan_count;
 556
 557         /**
 558          * filter_ssids - SSID-based scan result filtering
 559          *
 560          *   0 = do not filter scan results
 561          *   1 = only include configured SSIDs in scan results/BSS table
 562          */
 563         int filter_ssids;
 564
 565         /**
 566          * max_num_sta - Maximum number of STAs in an AP/P2P GO
 567          */
 568         unsigned int max_num_sta;
 569
 570         /**
 571          * changed_parameters - Bitmap of changed parameters since last update
 572          */
 573         unsigned int changed_parameters;
 574
 575         /**
 576          * disassoc_low_ack - Disassocicate stations with massive packet loss
 577          */
 578         int disassoc_low_ack;
 579
 580         /**
 581          * interworking - Whether Interworking (IEEE 802.11u) is enabled
 582          */
 583         int interworking;
 584
 585         /**
 586          * access_network_type - Access Network Type
 587          *
 588          * When Interworking is enabled, scans will be limited to APs that
 589          * advertise the specified Access Network Type (0..15; with 15
 590          * indicating wildcard match).
 591          */
 592         int access_network_type;
 593
 594         /**
 595          * hessid - Homogenous ESS identifier
 596          *
 597          * If this is set (any octet is non-zero), scans will be used to
 598          * request response only from BSSes belonging to the specified
 599          * Homogeneous ESS. This is used only if interworking is enabled.
 600          */
 601         u8 hessid[ETH_ALEN];
 602 };
 603
 604
 605 /* Prototypes for common functions from config.c */
 606
 607 void wpa_config_free(struct wpa_config *ssid);
 608 void wpa_config_free_ssid(struct wpa_ssid *ssid);
 609 void wpa_config_foreach_network(struct wpa_config *config,
 610                                 void (*func)(void *, struct wpa_ssid *),
 611                                 void *arg);
 612 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
 613 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
 614 int wpa_config_remove_network(struct wpa_config *config, int id);
 615 void wpa_config_set_network_defaults(struct wpa_ssid *ssid);
 616 int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
 617                    int line);
 618 int wpa_config_set_quoted(struct wpa_ssid *ssid, const char *var,
 619                           const char *value);
 620 char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys);
 621 char * wpa_config_get(struct wpa_ssid *ssid, const char *var);
 622 char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var);
 623 void wpa_config_update_psk(struct wpa_ssid *ssid);
 624 int wpa_config_add_prio_network(struct wpa_config *config,
 625                                 struct wpa_ssid *ssid);
 626 int wpa_config_update_prio_list(struct wpa_config *config);
 627 const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
 628                                                    const char *name);
 629 void wpa_config_set_blob(struct wpa_config *config,
 630                          struct wpa_config_blob *blob);
 631 void wpa_config_free_blob(struct wpa_config_blob *blob);
 632 int wpa_config_remove_blob(struct wpa_config *config, const char *name);
 633
 634 struct wpa_cred * wpa_config_get_cred(struct wpa_config *config, int id);
 635 struct wpa_cred * wpa_config_add_cred(struct wpa_config *config);
 636 int wpa_config_remove_cred(struct wpa_config *config, int id);
 637 void wpa_config_free_cred(struct wpa_cred *cred);
 638 int wpa_config_set_cred(struct wpa_cred *cred, const char *var,
 639                         const char *value, int line);
 640
 641 struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
 642                                            const char *driver_param);
 643 #ifndef CONFIG_NO_STDOUT_DEBUG
 644 void wpa_config_debug_dump_networks(struct wpa_config *config);
 645 #else /* CONFIG_NO_STDOUT_DEBUG */
 646 #define wpa_config_debug_dump_networks(c) do { } while (0)
 647 #endif /* CONFIG_NO_STDOUT_DEBUG */
 648
 649
 650 /* Prototypes for common functions from config.c */
 651 int wpa_config_process_global(struct wpa_config *config, char *pos, int line);
 652
 653
 654 /* Prototypes for backend specific functions from the selected config_*.c */
 655
 656 /**
 657  * wpa_config_read - Read and parse configuration database
 658  * @name: Name of the configuration (e.g., path and file name for the
 659  * configuration file)
 660  * Returns: Pointer to allocated configuration data or %NULL on failure
 661  *
 662  * This function reads configuration data, parses its contents, and allocates
 663  * data structures needed for storing configuration information. The allocated
 664  * data can be freed with wpa_config_free().
 665  *
 666  * Each configuration backend needs to implement this function.
 667  */
 668 struct wpa_config * wpa_config_read(const char *name);
 669
 670 /**
 671  * wpa_config_write - Write or update configuration data
 672  * @name: Name of the configuration (e.g., path and file name for the
 673  * configuration file)
 674  * @config: Configuration data from wpa_config_read()
 675  * Returns: 0 on success, -1 on failure
 676  *
 677  * This function write all configuration data into an external database (e.g.,
 678  * a text file) in a format that can be read with wpa_config_read(). This can
 679  * be used to allow wpa_supplicant to update its configuration, e.g., when a
 680  * new network is added or a password is changed.
 681  *
 682  * Each configuration backend needs to implement this function.
 683  */
 684 int wpa_config_write(const char *name, struct wpa_config *config);
 685
 686 #endif /* CONFIG_H */