wpa_supplicant/config.h

   1 /*
   2  * WPA Supplicant / Configuration file structures
   3  * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #ifndef CONFIG_H
  16 #define CONFIG_H
  17
  18 #define DEFAULT_EAPOL_VERSION 1
  19 #ifdef CONFIG_NO_SCAN_PROCESSING
  20 #define DEFAULT_AP_SCAN 2
  21 #else /* CONFIG_NO_SCAN_PROCESSING */
  22 #define DEFAULT_AP_SCAN 1
  23 #endif /* CONFIG_NO_SCAN_PROCESSING */
  24 #define DEFAULT_FAST_REAUTH 1
  25 #define DEFAULT_P2P_GO_INTENT 7
  26 #define DEFAULT_P2P_INTRA_BSS 1
  27 #define DEFAULT_BSS_MAX_COUNT 200
  28 #define DEFAULT_BSS_EXPIRATION_AGE 180
  29 #define DEFAULT_BSS_EXPIRATION_SCAN_COUNT 2
  30 #define DEFAULT_MAX_NUM_STA 128
  31 #define DEFAULT_ACCESS_NETWORK_TYPE 15
  32
  33 #include "config_ssid.h"
  34 #include "wps/wps.h"
  35
  36
  37 #define CFG_CHANGED_DEVICE_NAME BIT(0)
  38 #define CFG_CHANGED_CONFIG_METHODS BIT(1)
  39 #define CFG_CHANGED_DEVICE_TYPE BIT(2)
  40 #define CFG_CHANGED_OS_VERSION BIT(3)
  41 #define CFG_CHANGED_UUID BIT(4)
  42 #define CFG_CHANGED_COUNTRY BIT(5)
  43 #define CFG_CHANGED_SEC_DEVICE_TYPE BIT(6)
  44 #define CFG_CHANGED_P2P_SSID_POSTFIX BIT(7)
  45 #define CFG_CHANGED_WPS_STRING BIT(8)
  46 #define CFG_CHANGED_P2P_INTRA_BSS BIT(9)
  47 #define CFG_CHANGED_VENDOR_EXTENSION BIT(10)
  48 #define CFG_CHANGED_P2P_LISTEN_CHANNEL BIT(11)
  49 #define CFG_CHANGED_P2P_OPER_CHANNEL BIT(12)
  50
  51 /**
  52  * struct wpa_config - wpa_supplicant configuration data
  53  *
  54  * This data structure is presents the per-interface (radio) configuration
  55  * data. In many cases, there is only one struct wpa_config instance, but if
  56  * more than one network interface is being controlled, one instance is used
  57  * for each.
  58  */
  59 struct wpa_config {
  60         /**
  61          * ssid - Head of the global network list
  62          *
  63          * This is the head for the list of all the configured networks.
  64          */
  65         struct wpa_ssid *ssid;
  66
  67         /**
  68          * pssid - Per-priority network lists (in priority order)
  69          */
  70         struct wpa_ssid **pssid;
  71
  72         /**
  73          * num_prio - Number of different priorities used in the pssid lists
  74          *
  75          * This indicates how many per-priority network lists are included in
  76          * pssid.
  77          */
  78         int num_prio;
  79
  80         /**
  81          * eapol_version - IEEE 802.1X/EAPOL version number
  82          *
  83          * wpa_supplicant is implemented based on IEEE Std 802.1X-2004 which
  84          * defines EAPOL version 2. However, there are many APs that do not
  85          * handle the new version number correctly (they seem to drop the
  86          * frames completely). In order to make wpa_supplicant interoperate
  87          * with these APs, the version number is set to 1 by default. This
  88          * configuration value can be used to set it to the new version (2).
  89          */
  90         int eapol_version;
  91
  92         /**
  93          * ap_scan - AP scanning/selection
  94          *
  95          * By default, wpa_supplicant requests driver to perform AP
  96          * scanning and then uses the scan results to select a
  97          * suitable AP. Another alternative is to allow the driver to
  98          * take care of AP scanning and selection and use
  99          * wpa_supplicant just to process EAPOL frames based on IEEE
 100          * 802.11 association information from the driver.
 101          *
 102          * 1: wpa_supplicant initiates scanning and AP selection (default).
 103          *
 104          * 0: Driver takes care of scanning, AP selection, and IEEE 802.11
 105          * association parameters (e.g., WPA IE generation); this mode can
 106          * also be used with non-WPA drivers when using IEEE 802.1X mode;
 107          * do not try to associate with APs (i.e., external program needs
 108          * to control association). This mode must also be used when using
 109          * wired Ethernet drivers.
 110          *
 111          * 2: like 0, but associate with APs using security policy and SSID
 112          * (but not BSSID); this can be used, e.g., with ndiswrapper and NDIS
 113          * drivers to enable operation with hidden SSIDs and optimized roaming;
 114          * in this mode, the network blocks in the configuration are tried
 115          * one by one until the driver reports successful association; each
 116          * network block should have explicit security policy (i.e., only one
 117          * option in the lists) for key_mgmt, pairwise, group, proto variables.
 118          */
 119         int ap_scan;
 120
 121         /**
 122          * ctrl_interface - Parameters for the control interface
 123          *
 124          * If this is specified, %wpa_supplicant will open a control interface
 125          * that is available for external programs to manage %wpa_supplicant.
 126          * The meaning of this string depends on which control interface
 127          * mechanism is used. For all cases, the existence of this parameter
 128          * in configuration is used to determine whether the control interface
 129          * is enabled.
 130          *
 131          * For UNIX domain sockets (default on Linux and BSD): This is a
 132          * directory that will be created for UNIX domain sockets for listening
 133          * to requests from external programs (CLI/GUI, etc.) for status
 134          * information and configuration. The socket file will be named based
 135          * on the interface name, so multiple %wpa_supplicant processes can be
 136          * run at the same time if more than one interface is used.
 137          * /var/run/wpa_supplicant is the recommended directory for sockets and
 138          * by default, wpa_cli will use it when trying to connect with
 139          * %wpa_supplicant.
 140          *
 141          * Access control for the control interface can be configured
 142          * by setting the directory to allow only members of a group
 143          * to use sockets. This way, it is possible to run
 144          * %wpa_supplicant as root (since it needs to change network
 145          * configuration and open raw sockets) and still allow GUI/CLI
 146          * components to be run as non-root users. However, since the
 147          * control interface can be used to change the network
 148          * configuration, this access needs to be protected in many
 149          * cases. By default, %wpa_supplicant is configured to use gid
 150          * 0 (root). If you want to allow non-root users to use the
 151          * control interface, add a new group and change this value to
 152          * match with that group. Add users that should have control
 153          * interface access to this group.
 154          *
 155          * When configuring both the directory and group, use following format:
 156          * DIR=/var/run/wpa_supplicant GROUP=wheel
 157          * DIR=/var/run/wpa_supplicant GROUP=0
 158          * (group can be either group name or gid)
 159          *
 160          * For UDP connections (default on Windows): The value will be ignored.
 161          * This variable is just used to select that the control interface is
 162          * to be created. The value can be set to, e.g., udp
 163          * (ctrl_interface=udp).
 164          *
 165          * For Windows Named Pipe: This value can be used to set the security
 166          * descriptor for controlling access to the control interface. Security
 167          * descriptor can be set using Security Descriptor String Format (see
 168          * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/security_descriptor_string_format.asp).
 169          * The descriptor string needs to be prefixed with SDDL=. For example,
 170          * ctrl_interface=SDDL=D: would set an empty DACL (which will reject
 171          * all connections).
 172          */
 173         char *ctrl_interface;
 174
 175         /**
 176          * ctrl_interface_group - Control interface group (DEPRECATED)
 177          *
 178          * This variable is only used for backwards compatibility. Group for
 179          * UNIX domain sockets should now be specified using GROUP=group in
 180          * ctrl_interface variable.
 181          */
 182         char *ctrl_interface_group;
 183
 184         /**
 185          * fast_reauth - EAP fast re-authentication (session resumption)
 186          *
 187          * By default, fast re-authentication is enabled for all EAP methods
 188          * that support it. This variable can be used to disable fast
 189          * re-authentication (by setting fast_reauth=0). Normally, there is no
 190          * need to disable fast re-authentication.
 191          */
 192         int fast_reauth;
 193
 194         /**
 195          * opensc_engine_path - Path to the OpenSSL engine for opensc
 196          *
 197          * This is an OpenSSL specific configuration option for loading OpenSC
 198          * engine (engine_opensc.so); if %NULL, this engine is not loaded.
 199          */
 200         char *opensc_engine_path;
 201
 202         /**
 203          * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
 204          *
 205          * This is an OpenSSL specific configuration option for loading PKCS#11
 206          * engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
 207          */
 208         char *pkcs11_engine_path;
 209
 210         /**
 211          * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
 212          *
 213          * This is an OpenSSL specific configuration option for configuring
 214          * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
 215          * module is not loaded.
 216          */
 217         char *pkcs11_module_path;
 218
 219         /**
 220          * driver_param - Driver interface parameters
 221          *
 222          * This text string is passed to the selected driver interface with the
 223          * optional struct wpa_driver_ops::set_param() handler. This can be
 224          * used to configure driver specific options without having to add new
 225          * driver interface functionality.
 226          */
 227         char *driver_param;
 228
 229         /**
 230          * dot11RSNAConfigPMKLifetime - Maximum lifetime of a PMK
 231          *
 232          * dot11 MIB variable for the maximum lifetime of a PMK in the PMK
 233          * cache (unit: seconds).
 234          */
 235         unsigned int dot11RSNAConfigPMKLifetime;
 236
 237         /**
 238          * dot11RSNAConfigPMKReauthThreshold - PMK re-authentication threshold
 239          *
 240          * dot11 MIB variable for the percentage of the PMK lifetime
 241          * that should expire before an IEEE 802.1X reauthentication occurs.
 242          */
 243         unsigned int dot11RSNAConfigPMKReauthThreshold;
 244
 245         /**
 246          * dot11RSNAConfigSATimeout - Security association timeout
 247          *
 248          * dot11 MIB variable for the maximum time a security association
 249          * shall take to set up (unit: seconds).
 250          */
 251         unsigned int dot11RSNAConfigSATimeout;
 252
 253         /**
 254          * update_config - Is wpa_supplicant allowed to update configuration
 255          *
 256          * This variable control whether wpa_supplicant is allow to re-write
 257          * its configuration with wpa_config_write(). If this is zero,
 258          * configuration data is only changed in memory and the external data
 259          * is not overriden. If this is non-zero, wpa_supplicant will update
 260          * the configuration data (e.g., a file) whenever configuration is
 261          * changed. This update may replace the old configuration which can
 262          * remove comments from it in case of a text file configuration.
 263          */
 264         int update_config;
 265
 266         /**
 267          * blobs - Configuration blobs
 268          */
 269         struct wpa_config_blob *blobs;
 270
 271         /**
 272          * uuid - Universally Unique IDentifier (UUID; see RFC 4122) for WPS
 273          */
 274         u8 uuid[16];
 275
 276         /**
 277          * device_name - Device Name (WPS)
 278          * User-friendly description of device; up to 32 octets encoded in
 279          * UTF-8
 280          */
 281         char *device_name;
 282
 283         /**
 284          * manufacturer - Manufacturer (WPS)
 285          * The manufacturer of the device (up to 64 ASCII characters)
 286          */
 287         char *manufacturer;
 288
 289         /**
 290          * model_name - Model Name (WPS)
 291          * Model of the device (up to 32 ASCII characters)
 292          */
 293         char *model_name;
 294
 295         /**
 296          * model_number - Model Number (WPS)
 297          * Additional device description (up to 32 ASCII characters)
 298          */
 299         char *model_number;
 300
 301         /**
 302          * serial_number - Serial Number (WPS)
 303          * Serial number of the device (up to 32 characters)
 304          */
 305         char *serial_number;
 306
 307         /**
 308          * device_type - Primary Device Type (WPS)
 309          */
 310         u8 device_type[WPS_DEV_TYPE_LEN];
 311
 312         /**
 313          * config_methods - Config Methods
 314          *
 315          * This is a space-separated list of supported WPS configuration
 316          * methods. For example, "label virtual_display virtual_push_button
 317          * keypad".
 318          * Available methods: usba ethernet label display ext_nfc_token
 319          * int_nfc_token nfc_interface push_button keypad
 320          * virtual_display physical_display
 321          * virtual_push_button physical_push_button.
 322          */
 323         char *config_methods;
 324
 325         /**
 326          * os_version - OS Version (WPS)
 327          * 4-octet operating system version number
 328          */
 329         u8 os_version[4];
 330
 331         /**
 332          * country - Country code
 333          *
 334          * This is the ISO/IEC alpha2 country code for which we are operating
 335          * in
 336          */
 337         char country[2];
 338
 339         /**
 340          * wps_cred_processing - Credential processing
 341          *
 342          *   0 = process received credentials internally
 343          *   1 = do not process received credentials; just pass them over
 344          *      ctrl_iface to external program(s)
 345          *   2 = process received credentials internally and pass them over
 346          *      ctrl_iface to external program(s)
 347          */
 348         int wps_cred_processing;
 349
 350 #define MAX_SEC_DEVICE_TYPES 5
 351         /**
 352          * sec_device_types - Secondary Device Types (P2P)
 353          */
 354         u8 sec_device_type[MAX_SEC_DEVICE_TYPES][WPS_DEV_TYPE_LEN];
 355         int num_sec_device_types;
 356
 357         int p2p_listen_reg_class;
 358         int p2p_listen_channel;
 359         int p2p_oper_reg_class;
 360         int p2p_oper_channel;
 361         int p2p_go_intent;
 362         char *p2p_ssid_postfix;
 363         int persistent_reconnect;
 364         int p2p_intra_bss;
 365
 366 #define MAX_WPS_VENDOR_EXT 10
 367         /**
 368          * wps_vendor_ext - Vendor extension attributes in WPS
 369          */
 370         struct wpabuf *wps_vendor_ext[MAX_WPS_VENDOR_EXT];
 371
 372         /**
 373          * p2p_group_idle - Maximum idle time in seconds for P2P group
 374          *
 375          * This value controls how long a P2P group is maintained after there
 376          * is no other members in the group. As a GO, this means no associated
 377          * stations in the group. As a P2P client, this means no GO seen in
 378          * scan results. The maximum idle time is specified in seconds with 0
 379          * indicating no time limit, i.e., the P2P group remains in active
 380          * state indefinitely until explicitly removed.
 381          */
 382         unsigned int p2p_group_idle;
 383
 384         /**
 385          * bss_max_count - Maximum number of BSS entries to keep in memory
 386          */
 387         unsigned int bss_max_count;
 388
 389         /**
 390          * bss_expiration_age - BSS entry age after which it can be expired
 391          *
 392          * This value controls the time in seconds after which a BSS entry
 393          * gets removed if it has not been updated or is not in use.
 394          */
 395         unsigned int bss_expiration_age;
 396
 397         /**
 398          * bss_expiration_scan_count - Expire BSS after number of scans
 399          *
 400          * If the BSS entry has not been seen in this many scans, it will be
 401          * removed. A value of 1 means that entry is removed after the first
 402          * scan in which the BSSID is not seen. Larger values can be used
 403          * to avoid BSS entries disappearing if they are not visible in
 404          * every scan (e.g., low signal quality or interference).
 405          */
 406         unsigned int bss_expiration_scan_count;
 407
 408         /**
 409          * filter_ssids - SSID-based scan result filtering
 410          *
 411          *   0 = do not filter scan results
 412          *   1 = only include configured SSIDs in scan results/BSS table
 413          */
 414         int filter_ssids;
 415
 416         /**
 417          * max_num_sta - Maximum number of STAs in an AP/P2P GO
 418          */
 419         unsigned int max_num_sta;
 420
 421         /**
 422          * changed_parameters - Bitmap of changed parameters since last update
 423          */
 424         unsigned int changed_parameters;
 425
 426         /**
 427          * disassoc_low_ack - Disassocicate stations with massive packet loss
 428          */
 429         int disassoc_low_ack;
 430
 431         /**
 432          * interworking - Whether Interworking (IEEE 802.11u) is enabled
 433          */
 434         int interworking;
 435
 436         /**
 437          * access_network_type - Access Network Type
 438          *
 439          * When Interworking is enabled, scans will be limited to APs that
 440          * advertise the specified Access Network Type (0..15; with 15
 441          * indicating wildcard match).
 442          */
 443         int access_network_type;
 444
 445         /**
 446          * hessid - Homogenous ESS identifier
 447          *
 448          * If this is set (any octet is non-zero), scans will be used to
 449          * request response only from BSSes belonging to the specified
 450          * Homogeneous ESS. This is used only if interworking is enabled.
 451          */
 452         u8 hessid[ETH_ALEN];
 453
 454         /**
 455          * home_realm - Home Realm for Interworking
 456          */
 457         char *home_realm;
 458
 459         /**
 460          * home_username - Username for Interworking network selection
 461          */
 462         char *home_username;
 463
 464         /**
 465          * home_password - Password for Interworking network selection
 466          */
 467         char *home_password;
 468
 469         /**
 470          * home_ca_cert - CA certificate for Interworking network selection
 471          */
 472         char *home_ca_cert;
 473
 474         /**
 475          * home_imsi - IMSI in <MCC> | <MNC> | '-' | <MSIN> format
 476          */
 477         char *home_imsi;
 478
 479         /**
 480          * home_milenage - Milenage parameters for SIM/USIM simulator in
 481          *      <Ki>:<OPc>:<SQN> format
 482          */
 483         char *home_milenage;
 484 };
 485
 486
 487 /* Prototypes for common functions from config.c */
 488
 489 void wpa_config_free(struct wpa_config *ssid);
 490 void wpa_config_free_ssid(struct wpa_ssid *ssid);
 491 void wpa_config_foreach_network(struct wpa_config *config,
 492                                 void (*func)(void *, struct wpa_ssid *),
 493                                 void *arg);
 494 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
 495 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
 496 int wpa_config_remove_network(struct wpa_config *config, int id);
 497 void wpa_config_set_network_defaults(struct wpa_ssid *ssid);
 498 int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
 499                    int line);
 500 int wpa_config_set_quoted(struct wpa_ssid *ssid, const char *var,
 501                           const char *value);
 502 char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys);
 503 char * wpa_config_get(struct wpa_ssid *ssid, const char *var);
 504 char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var);
 505 void wpa_config_update_psk(struct wpa_ssid *ssid);
 506 int wpa_config_add_prio_network(struct wpa_config *config,
 507                                 struct wpa_ssid *ssid);
 508 int wpa_config_update_prio_list(struct wpa_config *config);
 509 const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
 510                                                    const char *name);
 511 void wpa_config_set_blob(struct wpa_config *config,
 512                          struct wpa_config_blob *blob);
 513 void wpa_config_free_blob(struct wpa_config_blob *blob);
 514 int wpa_config_remove_blob(struct wpa_config *config, const char *name);
 515
 516 struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
 517                                            const char *driver_param);
 518 #ifndef CONFIG_NO_STDOUT_DEBUG
 519 void wpa_config_debug_dump_networks(struct wpa_config *config);
 520 #else /* CONFIG_NO_STDOUT_DEBUG */
 521 #define wpa_config_debug_dump_networks(c) do { } while (0)
 522 #endif /* CONFIG_NO_STDOUT_DEBUG */
 523
 524
 525 /* Prototypes for common functions from config.c */
 526 int wpa_config_process_global(struct wpa_config *config, char *pos, int line);
 527
 528
 529 /* Prototypes for backend specific functions from the selected config_*.c */
 530
 531 /**
 532  * wpa_config_read - Read and parse configuration database
 533  * @name: Name of the configuration (e.g., path and file name for the
 534  * configuration file)
 535  * Returns: Pointer to allocated configuration data or %NULL on failure
 536  *
 537  * This function reads configuration data, parses its contents, and allocates
 538  * data structures needed for storing configuration information. The allocated
 539  * data can be freed with wpa_config_free().
 540  *
 541  * Each configuration backend needs to implement this function.
 542  */
 543 struct wpa_config * wpa_config_read(const char *name);
 544
 545 /**
 546  * wpa_config_write - Write or update configuration data
 547  * @name: Name of the configuration (e.g., path and file name for the
 548  * configuration file)
 549  * @config: Configuration data from wpa_config_read()
 550  * Returns: 0 on success, -1 on failure
 551  *
 552  * This function write all configuration data into an external database (e.g.,
 553  * a text file) in a format that can be read with wpa_config_read(). This can
 554  * be used to allow wpa_supplicant to update its configuration, e.g., when a
 555  * new network is added or a password is changed.
 556  *
 557  * Each configuration backend needs to implement this function.
 558  */
 559 int wpa_config_write(const char *name, struct wpa_config *config);
 560
 561 #endif /* CONFIG_H */