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
  26 #include "config_ssid.h"
  27
  28
  29 /**
  30  * struct wpa_config - wpa_supplicant configuration data
  31  *
  32  * This data structure is presents the per-interface (radio) configuration
  33  * data. In many cases, there is only one struct wpa_config instance, but if
  34  * more than one network interface is being controlled, one instance is used
  35  * for each.
  36  */
  37 struct wpa_config {
  38         /**
  39          * ssid - Head of the global network list
  40          *
  41          * This is the head for the list of all the configured networks.
  42          */
  43         struct wpa_ssid *ssid;
  44
  45         /**
  46          * pssid - Per-priority network lists (in priority order)
  47          */
  48         struct wpa_ssid **pssid;
  49
  50         /**
  51          * num_prio - Number of different priorities used in the pssid lists
  52          *
  53          * This indicates how many per-priority network lists are included in
  54          * pssid.
  55          */
  56         int num_prio;
  57
  58         /**
  59          * eapol_version - IEEE 802.1X/EAPOL version number
  60          *
  61          * wpa_supplicant is implemented based on IEEE Std 802.1X-2004 which
  62          * defines EAPOL version 2. However, there are many APs that do not
  63          * handle the new version number correctly (they seem to drop the
  64          * frames completely). In order to make wpa_supplicant interoperate
  65          * with these APs, the version number is set to 1 by default. This
  66          * configuration value can be used to set it to the new version (2).
  67          */
  68         int eapol_version;
  69
  70         /**
  71          * ap_scan - AP scanning/selection
  72          *
  73          * By default, wpa_supplicant requests driver to perform AP
  74          * scanning and then uses the scan results to select a
  75          * suitable AP. Another alternative is to allow the driver to
  76          * take care of AP scanning and selection and use
  77          * wpa_supplicant just to process EAPOL frames based on IEEE
  78          * 802.11 association information from the driver.
  79          *
  80          * 1: wpa_supplicant initiates scanning and AP selection (default).
  81          *
  82          * 0: Driver takes care of scanning, AP selection, and IEEE 802.11
  83          * association parameters (e.g., WPA IE generation); this mode can
  84          * also be used with non-WPA drivers when using IEEE 802.1X mode;
  85          * do not try to associate with APs (i.e., external program needs
  86          * to control association). This mode must also be used when using
  87          * wired Ethernet drivers.
  88          *
  89          * 2: like 0, but associate with APs using security policy and SSID
  90          * (but not BSSID); this can be used, e.g., with ndiswrapper and NDIS
  91          * drivers to enable operation with hidden SSIDs and optimized roaming;
  92          * in this mode, the network blocks in the configuration are tried
  93          * one by one until the driver reports successful association; each
  94          * network block should have explicit security policy (i.e., only one
  95          * option in the lists) for key_mgmt, pairwise, group, proto variables.
  96          */
  97         int ap_scan;
  98
  99         /**
 100          * ctrl_interface - Parameters for the control interface
 101          *
 102          * If this is specified, %wpa_supplicant will open a control interface
 103          * that is available for external programs to manage %wpa_supplicant.
 104          * The meaning of this string depends on which control interface
 105          * mechanism is used. For all cases, the existance of this parameter
 106          * in configuration is used to determine whether the control interface
 107          * is enabled.
 108          *
 109          * For UNIX domain sockets (default on Linux and BSD): This is a
 110          * directory that will be created for UNIX domain sockets for listening
 111          * to requests from external programs (CLI/GUI, etc.) for status
 112          * information and configuration. The socket file will be named based
 113          * on the interface name, so multiple %wpa_supplicant processes can be
 114          * run at the same time if more than one interface is used.
 115          * /var/run/wpa_supplicant is the recommended directory for sockets and
 116          * by default, wpa_cli will use it when trying to connect with
 117          * %wpa_supplicant.
 118          *
 119          * Access control for the control interface can be configured
 120          * by setting the directory to allow only members of a group
 121          * to use sockets. This way, it is possible to run
 122          * %wpa_supplicant as root (since it needs to change network
 123          * configuration and open raw sockets) and still allow GUI/CLI
 124          * components to be run as non-root users. However, since the
 125          * control interface can be used to change the network
 126          * configuration, this access needs to be protected in many
 127          * cases. By default, %wpa_supplicant is configured to use gid
 128          * 0 (root). If you want to allow non-root users to use the
 129          * control interface, add a new group and change this value to
 130          * match with that group. Add users that should have control
 131          * interface access to this group.
 132          *
 133          * When configuring both the directory and group, use following format:
 134          * DIR=/var/run/wpa_supplicant GROUP=wheel
 135          * DIR=/var/run/wpa_supplicant GROUP=0
 136          * (group can be either group name or gid)
 137          *
 138          * For UDP connections (default on Windows): The value will be ignored.
 139          * This variable is just used to select that the control interface is
 140          * to be created. The value can be set to, e.g., udp
 141          * (ctrl_interface=udp).
 142          *
 143          * For Windows Named Pipe: This value can be used to set the security
 144          * descriptor for controlling access to the control interface. Security
 145          * descriptor can be set using Security Descriptor String Format (see
 146          * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/security_descriptor_string_format.asp).
 147          * The descriptor string needs to be prefixed with SDDL=. For example,
 148          * ctrl_interface=SDDL=D: would set an empty DACL (which will reject
 149          * all connections).
 150          */
 151         char *ctrl_interface;
 152
 153         /**
 154          * ctrl_interface_group - Control interface group (DEPRECATED)
 155          *
 156          * This variable is only used for backwards compatibility. Group for
 157          * UNIX domain sockets should now be specified using GROUP=group in
 158          * ctrl_interface variable.
 159          */
 160         char *ctrl_interface_group;
 161
 162         /**
 163          * fast_reauth - EAP fast re-authentication (session resumption)
 164          *
 165          * By default, fast re-authentication is enabled for all EAP methods
 166          * that support it. This variable can be used to disable fast
 167          * re-authentication (by setting fast_reauth=0). Normally, there is no
 168          * need to disable fast re-authentication.
 169          */
 170         int fast_reauth;
 171
 172 #ifdef EAP_TLS_OPENSSL
 173         /**
 174          * opensc_engine_path - Path to the OpenSSL engine for opensc
 175          *
 176          * This is an OpenSSL specific configuration option for loading OpenSC
 177          * engine (engine_opensc.so); if %NULL, this engine is not loaded.
 178          */
 179         char *opensc_engine_path;
 180
 181         /**
 182          * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
 183          *
 184          * This is an OpenSSL specific configuration option for loading PKCS#11
 185          * engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
 186          */
 187         char *pkcs11_engine_path;
 188
 189         /**
 190          * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
 191          *
 192          * This is an OpenSSL specific configuration option for configuring
 193          * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
 194          * module is not loaded.
 195          */
 196         char *pkcs11_module_path;
 197 #endif /* EAP_TLS_OPENSSL */
 198
 199         /**
 200          * driver_param - Driver interface parameters
 201          *
 202          * This text string is passed to the selected driver interface with the
 203          * optional struct wpa_driver_ops::set_param() handler. This can be
 204          * used to configure driver specific options without having to add new
 205          * driver interface functionality.
 206          */
 207         char *driver_param;
 208
 209         /**
 210          * dot11RSNAConfigPMKLifetime - Maximum lifetime of a PMK
 211          *
 212          * dot11 MIB variable for the maximum lifetime of a PMK in the PMK
 213          * cache (unit: seconds).
 214          */
 215         unsigned int dot11RSNAConfigPMKLifetime;
 216
 217         /**
 218          * dot11RSNAConfigPMKReauthThreshold - PMK re-authentication threshold
 219          *
 220          * dot11 MIB variable for the percentage of the PMK lifetime
 221          * that should expire before an IEEE 802.1X reauthentication occurs.
 222          */
 223         unsigned int dot11RSNAConfigPMKReauthThreshold;
 224
 225         /**
 226          * dot11RSNAConfigSATimeout - Security association timeout
 227          *
 228          * dot11 MIB variable for the maximum time a security association
 229          * shall take to set up (unit: seconds).
 230          */
 231         unsigned int dot11RSNAConfigSATimeout;
 232
 233         /**
 234          * update_config - Is wpa_supplicant allowed to update configuration
 235          *
 236          * This variable control whether wpa_supplicant is allow to re-write
 237          * its configuration with wpa_config_write(). If this is zero,
 238          * configuration data is only changed in memory and the external data
 239          * is not overriden. If this is non-zero, wpa_supplicant will update
 240          * the configuration data (e.g., a file) whenever configuration is
 241          * changed. This update may replace the old configuration which can
 242          * remove comments from it in case of a text file configuration.
 243          */
 244         int update_config;
 245
 246         /**
 247          * blobs - Configuration blobs
 248          */
 249         struct wpa_config_blob *blobs;
 250
 251         /**
 252          * uuid - Universally Unique IDentifier (UUID; see RFC 4122) for WPS
 253          */
 254         u8 uuid[16];
 255
 256         /**
 257          * device_name - Device Name (WPS)
 258          * User-friendly description of device; up to 32 octets encoded in
 259          * UTF-8
 260          */
 261         char *device_name;
 262
 263         /**
 264          * manufacturer - Manufacturer (WPS)
 265          * The manufacturer of the device (up to 64 ASCII characters)
 266          */
 267         char *manufacturer;
 268
 269         /**
 270          * model_name - Model Name (WPS)
 271          * Model of the device (up to 32 ASCII characters)
 272          */
 273         char *model_name;
 274
 275         /**
 276          * model_number - Model Number (WPS)
 277          * Additional device description (up to 32 ASCII characters)
 278          */
 279         char *model_number;
 280
 281         /**
 282          * serial_number - Serial Number (WPS)
 283          * Serial number of the device (up to 32 characters)
 284          */
 285         char *serial_number;
 286
 287         /**
 288          * device_type - Primary Device Type (WPS)
 289          * Used format: categ-OUI-subcateg
 290          * categ = Category as an integer value
 291          * OUI = OUI and type octet as a 4-octet hex-encoded value;
 292          *      0050F204 for default WPS OUI
 293          * subcateg = OUI-specific Sub Category as an integer value
 294          * Examples:
 295          *   1-0050F204-1 (Computer / PC)
 296          *   1-0050F204-2 (Computer / Server)
 297          *   5-0050F204-1 (Storage / NAS)
 298          *   6-0050F204-1 (Network Infrastructure / AP)
 299          */
 300         char *device_type;
 301
 302         /**
 303          * os_version - OS Version (WPS)
 304          * 4-octet operating system version number
 305          */
 306         u8 os_version[4];
 307
 308         /**
 309          * country - Country code
 310          *
 311          * This is the ISO/IEC alpha2 country code for which we are operating
 312          * in
 313          */
 314         char country[2];
 315 };
 316
 317
 318 /* Prototypes for common functions from config.c */
 319
 320 void wpa_config_free(struct wpa_config *ssid);
 321 void wpa_config_free_ssid(struct wpa_ssid *ssid);
 322 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
 323 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
 324 int wpa_config_remove_network(struct wpa_config *config, int id);
 325 void wpa_config_set_network_defaults(struct wpa_ssid *ssid);
 326 int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
 327                    int line);
 328 char * wpa_config_get(struct wpa_ssid *ssid, const char *var);
 329 char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var);
 330 void wpa_config_update_psk(struct wpa_ssid *ssid);
 331 int wpa_config_add_prio_network(struct wpa_config *config,
 332                                 struct wpa_ssid *ssid);
 333 const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
 334                                                    const char *name);
 335 void wpa_config_set_blob(struct wpa_config *config,
 336                          struct wpa_config_blob *blob);
 337 void wpa_config_free_blob(struct wpa_config_blob *blob);
 338 int wpa_config_remove_blob(struct wpa_config *config, const char *name);
 339
 340 struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
 341                                            const char *driver_param);
 342 #ifndef CONFIG_NO_STDOUT_DEBUG
 343 void wpa_config_debug_dump_networks(struct wpa_config *config);
 344 #else /* CONFIG_NO_STDOUT_DEBUG */
 345 #define wpa_config_debug_dump_networks(c) do { } while (0)
 346 #endif /* CONFIG_NO_STDOUT_DEBUG */
 347
 348
 349 /* Prototypes for backend specific functions from the selected config_*.c */
 350
 351 /**
 352  * wpa_config_read - Read and parse configuration database
 353  * @name: Name of the configuration (e.g., path and file name for the
 354  * configuration file)
 355  * Returns: Pointer to allocated configuration data or %NULL on failure
 356  *
 357  * This function reads configuration data, parses its contents, and allocates
 358  * data structures needed for storing configuration information. The allocated
 359  * data can be freed with wpa_config_free().
 360  *
 361  * Each configuration backend needs to implement this function.
 362  */
 363 struct wpa_config * wpa_config_read(const char *name);
 364
 365 /**
 366  * wpa_config_write - Write or update configuration data
 367  * @name: Name of the configuration (e.g., path and file name for the
 368  * configuration file)
 369  * @config: Configuration data from wpa_config_read()
 370  * Returns: 0 on success, -1 on failure
 371  *
 372  * This function write all configuration data into an external database (e.g.,
 373  * a text file) in a format that can be read with wpa_config_read(). This can
 374  * be used to allow wpa_supplicant to update its configuration, e.g., when a
 375  * new network is added or a password is changed.
 376  *
 377  * Each configuration backend needs to implement this function.
 378  */
 379 int wpa_config_write(const char *name, struct wpa_config *config);
 380
 381 #endif /* CONFIG_H */