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