2 * WPA Supplicant / Configuration file structures
3 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
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_BSS_MAX_COUNT 200
27 #include "config_ssid.h"
30 #define CFG_CHANGED_DEVICE_NAME BIT(0)
31 #define CFG_CHANGED_CONFIG_METHODS BIT(1)
32 #define CFG_CHANGED_DEVICE_TYPE BIT(2)
33 #define CFG_CHANGED_OS_VERSION BIT(3)
34 #define CFG_CHANGED_UUID BIT(4)
35 #define CFG_CHANGED_COUNTRY BIT(5)
38 * struct wpa_config - wpa_supplicant configuration data
40 * This data structure is presents the per-interface (radio) configuration
41 * data. In many cases, there is only one struct wpa_config instance, but if
42 * more than one network interface is being controlled, one instance is used
47 * ssid - Head of the global network list
49 * This is the head for the list of all the configured networks.
51 struct wpa_ssid *ssid;
54 * pssid - Per-priority network lists (in priority order)
56 struct wpa_ssid **pssid;
59 * num_prio - Number of different priorities used in the pssid lists
61 * This indicates how many per-priority network lists are included in
67 * eapol_version - IEEE 802.1X/EAPOL version number
69 * wpa_supplicant is implemented based on IEEE Std 802.1X-2004 which
70 * defines EAPOL version 2. However, there are many APs that do not
71 * handle the new version number correctly (they seem to drop the
72 * frames completely). In order to make wpa_supplicant interoperate
73 * with these APs, the version number is set to 1 by default. This
74 * configuration value can be used to set it to the new version (2).
79 * ap_scan - AP scanning/selection
81 * By default, wpa_supplicant requests driver to perform AP
82 * scanning and then uses the scan results to select a
83 * suitable AP. Another alternative is to allow the driver to
84 * take care of AP scanning and selection and use
85 * wpa_supplicant just to process EAPOL frames based on IEEE
86 * 802.11 association information from the driver.
88 * 1: wpa_supplicant initiates scanning and AP selection (default).
90 * 0: Driver takes care of scanning, AP selection, and IEEE 802.11
91 * association parameters (e.g., WPA IE generation); this mode can
92 * also be used with non-WPA drivers when using IEEE 802.1X mode;
93 * do not try to associate with APs (i.e., external program needs
94 * to control association). This mode must also be used when using
95 * wired Ethernet drivers.
97 * 2: like 0, but associate with APs using security policy and SSID
98 * (but not BSSID); this can be used, e.g., with ndiswrapper and NDIS
99 * drivers to enable operation with hidden SSIDs and optimized roaming;
100 * in this mode, the network blocks in the configuration are tried
101 * one by one until the driver reports successful association; each
102 * network block should have explicit security policy (i.e., only one
103 * option in the lists) for key_mgmt, pairwise, group, proto variables.
108 * ctrl_interface - Parameters for the control interface
110 * If this is specified, %wpa_supplicant will open a control interface
111 * that is available for external programs to manage %wpa_supplicant.
112 * The meaning of this string depends on which control interface
113 * mechanism is used. For all cases, the existance of this parameter
114 * in configuration is used to determine whether the control interface
117 * For UNIX domain sockets (default on Linux and BSD): This is a
118 * directory that will be created for UNIX domain sockets for listening
119 * to requests from external programs (CLI/GUI, etc.) for status
120 * information and configuration. The socket file will be named based
121 * on the interface name, so multiple %wpa_supplicant processes can be
122 * run at the same time if more than one interface is used.
123 * /var/run/wpa_supplicant is the recommended directory for sockets and
124 * by default, wpa_cli will use it when trying to connect with
127 * Access control for the control interface can be configured
128 * by setting the directory to allow only members of a group
129 * to use sockets. This way, it is possible to run
130 * %wpa_supplicant as root (since it needs to change network
131 * configuration and open raw sockets) and still allow GUI/CLI
132 * components to be run as non-root users. However, since the
133 * control interface can be used to change the network
134 * configuration, this access needs to be protected in many
135 * cases. By default, %wpa_supplicant is configured to use gid
136 * 0 (root). If you want to allow non-root users to use the
137 * control interface, add a new group and change this value to
138 * match with that group. Add users that should have control
139 * interface access to this group.
141 * When configuring both the directory and group, use following format:
142 * DIR=/var/run/wpa_supplicant GROUP=wheel
143 * DIR=/var/run/wpa_supplicant GROUP=0
144 * (group can be either group name or gid)
146 * For UDP connections (default on Windows): The value will be ignored.
147 * This variable is just used to select that the control interface is
148 * to be created. The value can be set to, e.g., udp
149 * (ctrl_interface=udp).
151 * For Windows Named Pipe: This value can be used to set the security
152 * descriptor for controlling access to the control interface. Security
153 * descriptor can be set using Security Descriptor String Format (see
154 * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/security_descriptor_string_format.asp).
155 * The descriptor string needs to be prefixed with SDDL=. For example,
156 * ctrl_interface=SDDL=D: would set an empty DACL (which will reject
159 char *ctrl_interface;
162 * ctrl_interface_group - Control interface group (DEPRECATED)
164 * This variable is only used for backwards compatibility. Group for
165 * UNIX domain sockets should now be specified using GROUP=group in
166 * ctrl_interface variable.
168 char *ctrl_interface_group;
171 * fast_reauth - EAP fast re-authentication (session resumption)
173 * By default, fast re-authentication is enabled for all EAP methods
174 * that support it. This variable can be used to disable fast
175 * re-authentication (by setting fast_reauth=0). Normally, there is no
176 * need to disable fast re-authentication.
181 * opensc_engine_path - Path to the OpenSSL engine for opensc
183 * This is an OpenSSL specific configuration option for loading OpenSC
184 * engine (engine_opensc.so); if %NULL, this engine is not loaded.
186 char *opensc_engine_path;
189 * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
191 * This is an OpenSSL specific configuration option for loading PKCS#11
192 * engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
194 char *pkcs11_engine_path;
197 * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
199 * This is an OpenSSL specific configuration option for configuring
200 * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
201 * module is not loaded.
203 char *pkcs11_module_path;
206 * driver_param - Driver interface parameters
208 * This text string is passed to the selected driver interface with the
209 * optional struct wpa_driver_ops::set_param() handler. This can be
210 * used to configure driver specific options without having to add new
211 * driver interface functionality.
216 * dot11RSNAConfigPMKLifetime - Maximum lifetime of a PMK
218 * dot11 MIB variable for the maximum lifetime of a PMK in the PMK
219 * cache (unit: seconds).
221 unsigned int dot11RSNAConfigPMKLifetime;
224 * dot11RSNAConfigPMKReauthThreshold - PMK re-authentication threshold
226 * dot11 MIB variable for the percentage of the PMK lifetime
227 * that should expire before an IEEE 802.1X reauthentication occurs.
229 unsigned int dot11RSNAConfigPMKReauthThreshold;
232 * dot11RSNAConfigSATimeout - Security association timeout
234 * dot11 MIB variable for the maximum time a security association
235 * shall take to set up (unit: seconds).
237 unsigned int dot11RSNAConfigSATimeout;
240 * update_config - Is wpa_supplicant allowed to update configuration
242 * This variable control whether wpa_supplicant is allow to re-write
243 * its configuration with wpa_config_write(). If this is zero,
244 * configuration data is only changed in memory and the external data
245 * is not overriden. If this is non-zero, wpa_supplicant will update
246 * the configuration data (e.g., a file) whenever configuration is
247 * changed. This update may replace the old configuration which can
248 * remove comments from it in case of a text file configuration.
253 * blobs - Configuration blobs
255 struct wpa_config_blob *blobs;
258 * uuid - Universally Unique IDentifier (UUID; see RFC 4122) for WPS
263 * device_name - Device Name (WPS)
264 * User-friendly description of device; up to 32 octets encoded in
270 * manufacturer - Manufacturer (WPS)
271 * The manufacturer of the device (up to 64 ASCII characters)
276 * model_name - Model Name (WPS)
277 * Model of the device (up to 32 ASCII characters)
282 * model_number - Model Number (WPS)
283 * Additional device description (up to 32 ASCII characters)
288 * serial_number - Serial Number (WPS)
289 * Serial number of the device (up to 32 characters)
294 * device_type - Primary Device Type (WPS)
295 * Used format: categ-OUI-subcateg
296 * categ = Category as an integer value
297 * OUI = OUI and type octet as a 4-octet hex-encoded value;
298 * 0050F204 for default WPS OUI
299 * subcateg = OUI-specific Sub Category as an integer value
301 * 1-0050F204-1 (Computer / PC)
302 * 1-0050F204-2 (Computer / Server)
303 * 5-0050F204-1 (Storage / NAS)
304 * 6-0050F204-1 (Network Infrastructure / AP)
309 * config_methods - Config Methods
311 * This is a space-separated list of supported WPS configuration
312 * methods. For example, "label virtual_display virtual_push_button
314 * Available methods: usba ethernet label display ext_nfc_token
315 * int_nfc_token nfc_interface push_button keypad
316 * virtual_display physical_display
317 * virtual_push_button physical_push_button.
319 char *config_methods;
322 * os_version - OS Version (WPS)
323 * 4-octet operating system version number
328 * country - Country code
330 * This is the ISO/IEC alpha2 country code for which we are operating
336 * wps_cred_processing - Credential processing
338 * 0 = process received credentials internally
339 * 1 = do not process received credentials; just pass them over
340 * ctrl_iface to external program(s)
341 * 2 = process received credentials internally and pass them over
342 * ctrl_iface to external program(s)
344 int wps_cred_processing;
347 * bss_max_count - Maximum number of BSS entries to keep in memory
349 unsigned int bss_max_count;
352 * filter_ssids - SSID-based scan result filtering
354 * 0 = do not filter scan results
355 * 1 = only include configured SSIDs in scan results/BSS table
360 * changed_parameters - Bitmap of changed parameters since last update
362 unsigned int changed_parameters;
366 /* Prototypes for common functions from config.c */
368 void wpa_config_free(struct wpa_config *ssid);
369 void wpa_config_free_ssid(struct wpa_ssid *ssid);
370 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
371 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
372 int wpa_config_remove_network(struct wpa_config *config, int id);
373 void wpa_config_set_network_defaults(struct wpa_ssid *ssid);
374 int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
376 char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys);
377 char * wpa_config_get(struct wpa_ssid *ssid, const char *var);
378 char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var);
379 void wpa_config_update_psk(struct wpa_ssid *ssid);
380 int wpa_config_add_prio_network(struct wpa_config *config,
381 struct wpa_ssid *ssid);
382 int wpa_config_update_prio_list(struct wpa_config *config);
383 const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
385 void wpa_config_set_blob(struct wpa_config *config,
386 struct wpa_config_blob *blob);
387 void wpa_config_free_blob(struct wpa_config_blob *blob);
388 int wpa_config_remove_blob(struct wpa_config *config, const char *name);
390 struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
391 const char *driver_param);
392 #ifndef CONFIG_NO_STDOUT_DEBUG
393 void wpa_config_debug_dump_networks(struct wpa_config *config);
394 #else /* CONFIG_NO_STDOUT_DEBUG */
395 #define wpa_config_debug_dump_networks(c) do { } while (0)
396 #endif /* CONFIG_NO_STDOUT_DEBUG */
399 /* Prototypes for common functions from config.c */
400 int wpa_config_process_global(struct wpa_config *config, char *pos, int line);
403 /* Prototypes for backend specific functions from the selected config_*.c */
406 * wpa_config_read - Read and parse configuration database
407 * @name: Name of the configuration (e.g., path and file name for the
408 * configuration file)
409 * Returns: Pointer to allocated configuration data or %NULL on failure
411 * This function reads configuration data, parses its contents, and allocates
412 * data structures needed for storing configuration information. The allocated
413 * data can be freed with wpa_config_free().
415 * Each configuration backend needs to implement this function.
417 struct wpa_config * wpa_config_read(const char *name);
420 * wpa_config_write - Write or update configuration data
421 * @name: Name of the configuration (e.g., path and file name for the
422 * configuration file)
423 * @config: Configuration data from wpa_config_read()
424 * Returns: 0 on success, -1 on failure
426 * This function write all configuration data into an external database (e.g.,
427 * a text file) in a format that can be read with wpa_config_read(). This can
428 * be used to allow wpa_supplicant to update its configuration, e.g., when a
429 * new network is added or a password is changed.
431 * Each configuration backend needs to implement this function.
433 int wpa_config_write(const char *name, struct wpa_config *config);
435 #endif /* CONFIG_H */