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_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
32 #include "config_ssid.h"
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)
49 * struct wpa_config - wpa_supplicant configuration data
51 * This data structure is presents the per-interface (radio) configuration
52 * data. In many cases, there is only one struct wpa_config instance, but if
53 * more than one network interface is being controlled, one instance is used
58 * ssid - Head of the global network list
60 * This is the head for the list of all the configured networks.
62 struct wpa_ssid *ssid;
65 * pssid - Per-priority network lists (in priority order)
67 struct wpa_ssid **pssid;
70 * num_prio - Number of different priorities used in the pssid lists
72 * This indicates how many per-priority network lists are included in
78 * eapol_version - IEEE 802.1X/EAPOL version number
80 * wpa_supplicant is implemented based on IEEE Std 802.1X-2004 which
81 * defines EAPOL version 2. However, there are many APs that do not
82 * handle the new version number correctly (they seem to drop the
83 * frames completely). In order to make wpa_supplicant interoperate
84 * with these APs, the version number is set to 1 by default. This
85 * configuration value can be used to set it to the new version (2).
90 * ap_scan - AP scanning/selection
92 * By default, wpa_supplicant requests driver to perform AP
93 * scanning and then uses the scan results to select a
94 * suitable AP. Another alternative is to allow the driver to
95 * take care of AP scanning and selection and use
96 * wpa_supplicant just to process EAPOL frames based on IEEE
97 * 802.11 association information from the driver.
99 * 1: wpa_supplicant initiates scanning and AP selection (default).
101 * 0: Driver takes care of scanning, AP selection, and IEEE 802.11
102 * association parameters (e.g., WPA IE generation); this mode can
103 * also be used with non-WPA drivers when using IEEE 802.1X mode;
104 * do not try to associate with APs (i.e., external program needs
105 * to control association). This mode must also be used when using
106 * wired Ethernet drivers.
108 * 2: like 0, but associate with APs using security policy and SSID
109 * (but not BSSID); this can be used, e.g., with ndiswrapper and NDIS
110 * drivers to enable operation with hidden SSIDs and optimized roaming;
111 * in this mode, the network blocks in the configuration are tried
112 * one by one until the driver reports successful association; each
113 * network block should have explicit security policy (i.e., only one
114 * option in the lists) for key_mgmt, pairwise, group, proto variables.
119 * ctrl_interface - Parameters for the control interface
121 * If this is specified, %wpa_supplicant will open a control interface
122 * that is available for external programs to manage %wpa_supplicant.
123 * The meaning of this string depends on which control interface
124 * mechanism is used. For all cases, the existance of this parameter
125 * in configuration is used to determine whether the control interface
128 * For UNIX domain sockets (default on Linux and BSD): This is a
129 * directory that will be created for UNIX domain sockets for listening
130 * to requests from external programs (CLI/GUI, etc.) for status
131 * information and configuration. The socket file will be named based
132 * on the interface name, so multiple %wpa_supplicant processes can be
133 * run at the same time if more than one interface is used.
134 * /var/run/wpa_supplicant is the recommended directory for sockets and
135 * by default, wpa_cli will use it when trying to connect with
138 * Access control for the control interface can be configured
139 * by setting the directory to allow only members of a group
140 * to use sockets. This way, it is possible to run
141 * %wpa_supplicant as root (since it needs to change network
142 * configuration and open raw sockets) and still allow GUI/CLI
143 * components to be run as non-root users. However, since the
144 * control interface can be used to change the network
145 * configuration, this access needs to be protected in many
146 * cases. By default, %wpa_supplicant is configured to use gid
147 * 0 (root). If you want to allow non-root users to use the
148 * control interface, add a new group and change this value to
149 * match with that group. Add users that should have control
150 * interface access to this group.
152 * When configuring both the directory and group, use following format:
153 * DIR=/var/run/wpa_supplicant GROUP=wheel
154 * DIR=/var/run/wpa_supplicant GROUP=0
155 * (group can be either group name or gid)
157 * For UDP connections (default on Windows): The value will be ignored.
158 * This variable is just used to select that the control interface is
159 * to be created. The value can be set to, e.g., udp
160 * (ctrl_interface=udp).
162 * For Windows Named Pipe: This value can be used to set the security
163 * descriptor for controlling access to the control interface. Security
164 * descriptor can be set using Security Descriptor String Format (see
165 * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/security_descriptor_string_format.asp).
166 * The descriptor string needs to be prefixed with SDDL=. For example,
167 * ctrl_interface=SDDL=D: would set an empty DACL (which will reject
170 char *ctrl_interface;
173 * ctrl_interface_group - Control interface group (DEPRECATED)
175 * This variable is only used for backwards compatibility. Group for
176 * UNIX domain sockets should now be specified using GROUP=group in
177 * ctrl_interface variable.
179 char *ctrl_interface_group;
182 * fast_reauth - EAP fast re-authentication (session resumption)
184 * By default, fast re-authentication is enabled for all EAP methods
185 * that support it. This variable can be used to disable fast
186 * re-authentication (by setting fast_reauth=0). Normally, there is no
187 * need to disable fast re-authentication.
192 * opensc_engine_path - Path to the OpenSSL engine for opensc
194 * This is an OpenSSL specific configuration option for loading OpenSC
195 * engine (engine_opensc.so); if %NULL, this engine is not loaded.
197 char *opensc_engine_path;
200 * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
202 * This is an OpenSSL specific configuration option for loading PKCS#11
203 * engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
205 char *pkcs11_engine_path;
208 * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
210 * This is an OpenSSL specific configuration option for configuring
211 * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
212 * module is not loaded.
214 char *pkcs11_module_path;
217 * driver_param - Driver interface parameters
219 * This text string is passed to the selected driver interface with the
220 * optional struct wpa_driver_ops::set_param() handler. This can be
221 * used to configure driver specific options without having to add new
222 * driver interface functionality.
227 * dot11RSNAConfigPMKLifetime - Maximum lifetime of a PMK
229 * dot11 MIB variable for the maximum lifetime of a PMK in the PMK
230 * cache (unit: seconds).
232 unsigned int dot11RSNAConfigPMKLifetime;
235 * dot11RSNAConfigPMKReauthThreshold - PMK re-authentication threshold
237 * dot11 MIB variable for the percentage of the PMK lifetime
238 * that should expire before an IEEE 802.1X reauthentication occurs.
240 unsigned int dot11RSNAConfigPMKReauthThreshold;
243 * dot11RSNAConfigSATimeout - Security association timeout
245 * dot11 MIB variable for the maximum time a security association
246 * shall take to set up (unit: seconds).
248 unsigned int dot11RSNAConfigSATimeout;
251 * update_config - Is wpa_supplicant allowed to update configuration
253 * This variable control whether wpa_supplicant is allow to re-write
254 * its configuration with wpa_config_write(). If this is zero,
255 * configuration data is only changed in memory and the external data
256 * is not overriden. If this is non-zero, wpa_supplicant will update
257 * the configuration data (e.g., a file) whenever configuration is
258 * changed. This update may replace the old configuration which can
259 * remove comments from it in case of a text file configuration.
264 * blobs - Configuration blobs
266 struct wpa_config_blob *blobs;
269 * uuid - Universally Unique IDentifier (UUID; see RFC 4122) for WPS
274 * device_name - Device Name (WPS)
275 * User-friendly description of device; up to 32 octets encoded in
281 * manufacturer - Manufacturer (WPS)
282 * The manufacturer of the device (up to 64 ASCII characters)
287 * model_name - Model Name (WPS)
288 * Model of the device (up to 32 ASCII characters)
293 * model_number - Model Number (WPS)
294 * Additional device description (up to 32 ASCII characters)
299 * serial_number - Serial Number (WPS)
300 * Serial number of the device (up to 32 characters)
305 * device_type - Primary Device Type (WPS)
307 u8 device_type[WPS_DEV_TYPE_LEN];
310 * config_methods - Config Methods
312 * This is a space-separated list of supported WPS configuration
313 * methods. For example, "label virtual_display virtual_push_button
315 * Available methods: usba ethernet label display ext_nfc_token
316 * int_nfc_token nfc_interface push_button keypad
317 * virtual_display physical_display
318 * virtual_push_button physical_push_button.
320 char *config_methods;
323 * os_version - OS Version (WPS)
324 * 4-octet operating system version number
329 * country - Country code
331 * This is the ISO/IEC alpha2 country code for which we are operating
337 * wps_cred_processing - Credential processing
339 * 0 = process received credentials internally
340 * 1 = do not process received credentials; just pass them over
341 * ctrl_iface to external program(s)
342 * 2 = process received credentials internally and pass them over
343 * ctrl_iface to external program(s)
345 int wps_cred_processing;
347 #define MAX_SEC_DEVICE_TYPES 5
349 * sec_device_types - Secondary Device Types (P2P)
351 u8 sec_device_type[MAX_SEC_DEVICE_TYPES][WPS_DEV_TYPE_LEN];
352 int num_sec_device_types;
354 int p2p_listen_reg_class;
355 int p2p_listen_channel;
356 int p2p_oper_reg_class;
357 int p2p_oper_channel;
359 char *p2p_ssid_postfix;
360 int persistent_reconnect;
363 #define MAX_WPS_VENDOR_EXT 10
365 * wps_vendor_ext - Vendor extension attributes in WPS
367 struct wpabuf *wps_vendor_ext[MAX_WPS_VENDOR_EXT];
370 * p2p_group_idle - Maximum idle time in seconds for P2P group
372 * This value controls how long a P2P group is maintained after there
373 * is no other members in the group. As a GO, this means no associated
374 * stations in the group. As a P2P client, this means no GO seen in
375 * scan results. The maximum idle time is specified in seconds with 0
376 * indicating no time limit, i.e., the P2P group remains in active
377 * state indefinitely until explicitly removed.
379 unsigned int p2p_group_idle;
382 * bss_max_count - Maximum number of BSS entries to keep in memory
384 unsigned int bss_max_count;
387 * bss_expiration_age - BSS entry age after which it can be expired
389 * This value controls the time in seconds after which a BSS entry
390 * gets removed if it has not been updated or is not in use.
392 unsigned int bss_expiration_age;
395 * bss_expiration_scan_count - Expire BSS after number of scans
397 * If the BSS entry has not been seen in this many scans, it will be
398 * removed. A value of 1 means that entry is removed after the first
399 * scan in which the BSSID is not seen. Larger values can be used
400 * to avoid BSS entries disappearing if they are not visible in
401 * every scan (e.g., low signal quality or interference).
403 unsigned int bss_expiration_scan_count;
406 * filter_ssids - SSID-based scan result filtering
408 * 0 = do not filter scan results
409 * 1 = only include configured SSIDs in scan results/BSS table
414 * max_num_sta - Maximum number of STAs in an AP/P2P GO
416 unsigned int max_num_sta;
419 * changed_parameters - Bitmap of changed parameters since last update
421 unsigned int changed_parameters;
424 * disassoc_low_ack - Disassocicate stations with massive packet loss
426 int disassoc_low_ack;
430 /* Prototypes for common functions from config.c */
432 void wpa_config_free(struct wpa_config *ssid);
433 void wpa_config_free_ssid(struct wpa_ssid *ssid);
434 void wpa_config_foreach_network(struct wpa_config *config,
435 void (*func)(void *, struct wpa_ssid *),
437 struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
438 struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
439 int wpa_config_remove_network(struct wpa_config *config, int id);
440 void wpa_config_set_network_defaults(struct wpa_ssid *ssid);
441 int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
443 char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys);
444 char * wpa_config_get(struct wpa_ssid *ssid, const char *var);
445 char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var);
446 void wpa_config_update_psk(struct wpa_ssid *ssid);
447 int wpa_config_add_prio_network(struct wpa_config *config,
448 struct wpa_ssid *ssid);
449 int wpa_config_update_prio_list(struct wpa_config *config);
450 const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
452 void wpa_config_set_blob(struct wpa_config *config,
453 struct wpa_config_blob *blob);
454 void wpa_config_free_blob(struct wpa_config_blob *blob);
455 int wpa_config_remove_blob(struct wpa_config *config, const char *name);
457 struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
458 const char *driver_param);
459 #ifndef CONFIG_NO_STDOUT_DEBUG
460 void wpa_config_debug_dump_networks(struct wpa_config *config);
461 #else /* CONFIG_NO_STDOUT_DEBUG */
462 #define wpa_config_debug_dump_networks(c) do { } while (0)
463 #endif /* CONFIG_NO_STDOUT_DEBUG */
466 /* Prototypes for common functions from config.c */
467 int wpa_config_process_global(struct wpa_config *config, char *pos, int line);
470 /* Prototypes for backend specific functions from the selected config_*.c */
473 * wpa_config_read - Read and parse configuration database
474 * @name: Name of the configuration (e.g., path and file name for the
475 * configuration file)
476 * Returns: Pointer to allocated configuration data or %NULL on failure
478 * This function reads configuration data, parses its contents, and allocates
479 * data structures needed for storing configuration information. The allocated
480 * data can be freed with wpa_config_free().
482 * Each configuration backend needs to implement this function.
484 struct wpa_config * wpa_config_read(const char *name);
487 * wpa_config_write - Write or update configuration data
488 * @name: Name of the configuration (e.g., path and file name for the
489 * configuration file)
490 * @config: Configuration data from wpa_config_read()
491 * Returns: 0 on success, -1 on failure
493 * This function write all configuration data into an external database (e.g.,
494 * a text file) in a format that can be read with wpa_config_read(). This can
495 * be used to allow wpa_supplicant to update its configuration, e.g., when a
496 * new network is added or a password is changed.
498 * Each configuration backend needs to implement this function.
500 int wpa_config_write(const char *name, struct wpa_config *config);
502 #endif /* CONFIG_H */