317 lines
12 KiB
C
317 lines
12 KiB
C
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/*
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* WPA Supplicant / Configuration file structures
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* Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#ifndef CONFIG_H
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#define CONFIG_H
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#define DEFAULT_EAPOL_VERSION 1
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#ifdef CONFIG_NO_SCAN_PROCESSING
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#define DEFAULT_AP_SCAN 2
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#else /* CONFIG_NO_SCAN_PROCESSING */
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#define DEFAULT_AP_SCAN 1
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#endif /* CONFIG_NO_SCAN_PROCESSING */
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#define DEFAULT_FAST_REAUTH 1
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#include "config_ssid.h"
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/**
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* struct wpa_config - wpa_supplicant configuration data
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*
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* This data structure is presents the per-interface (radio) configuration
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* data. In many cases, there is only one struct wpa_config instance, but if
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* more than one network interface is being controlled, one instance is used
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* for each.
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*/
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struct wpa_config {
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/**
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* ssid - Head of the global network list
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*
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* This is the head for the list of all the configured networks.
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*/
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struct wpa_ssid *ssid;
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/**
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* pssid - Per-priority network lists (in priority order)
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*/
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struct wpa_ssid **pssid;
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/**
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* num_prio - Number of different priorities used in the pssid lists
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*
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* This indicates how many per-priority network lists are included in
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* pssid.
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*/
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int num_prio;
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/**
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* eapol_version - IEEE 802.1X/EAPOL version number
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*
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* wpa_supplicant is implemented based on IEEE Std 802.1X-2004 which
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* defines EAPOL version 2. However, there are many APs that do not
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* handle the new version number correctly (they seem to drop the
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* frames completely). In order to make wpa_supplicant interoperate
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* with these APs, the version number is set to 1 by default. This
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* configuration value can be used to set it to the new version (2).
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*/
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int eapol_version;
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/**
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* ap_scan - AP scanning/selection
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*
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* By default, wpa_supplicant requests driver to perform AP
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* scanning and then uses the scan results to select a
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* suitable AP. Another alternative is to allow the driver to
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* take care of AP scanning and selection and use
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* wpa_supplicant just to process EAPOL frames based on IEEE
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* 802.11 association information from the driver.
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*
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* 1: wpa_supplicant initiates scanning and AP selection (default).
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*
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* 0: Driver takes care of scanning, AP selection, and IEEE 802.11
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* association parameters (e.g., WPA IE generation); this mode can
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* also be used with non-WPA drivers when using IEEE 802.1X mode;
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* do not try to associate with APs (i.e., external program needs
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* to control association). This mode must also be used when using
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* wired Ethernet drivers.
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*
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* 2: like 0, but associate with APs using security policy and SSID
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* (but not BSSID); this can be used, e.g., with ndiswrapper and NDIS
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* drivers to enable operation with hidden SSIDs and optimized roaming;
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* in this mode, the network blocks in the configuration are tried
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* one by one until the driver reports successful association; each
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* network block should have explicit security policy (i.e., only one
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* option in the lists) for key_mgmt, pairwise, group, proto variables.
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*/
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int ap_scan;
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/**
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* ctrl_interface - Parameters for the control interface
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*
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* If this is specified, %wpa_supplicant will open a control interface
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* that is available for external programs to manage %wpa_supplicant.
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* The meaning of this string depends on which control interface
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* mechanism is used. For all cases, the existance of this parameter
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* in configuration is used to determine whether the control interface
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* is enabled.
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*
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* For UNIX domain sockets (default on Linux and BSD): This is a
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* directory that will be created for UNIX domain sockets for listening
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* to requests from external programs (CLI/GUI, etc.) for status
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* information and configuration. The socket file will be named based
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* on the interface name, so multiple %wpa_supplicant processes can be
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* run at the same time if more than one interface is used.
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* /var/run/wpa_supplicant is the recommended directory for sockets and
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* by default, wpa_cli will use it when trying to connect with
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* %wpa_supplicant.
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*
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* Access control for the control interface can be configured
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* by setting the directory to allow only members of a group
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* to use sockets. This way, it is possible to run
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* %wpa_supplicant as root (since it needs to change network
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* configuration and open raw sockets) and still allow GUI/CLI
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* components to be run as non-root users. However, since the
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* control interface can be used to change the network
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* configuration, this access needs to be protected in many
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* cases. By default, %wpa_supplicant is configured to use gid
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* 0 (root). If you want to allow non-root users to use the
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* control interface, add a new group and change this value to
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* match with that group. Add users that should have control
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* interface access to this group.
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*
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* When configuring both the directory and group, use following format:
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* DIR=/var/run/wpa_supplicant GROUP=wheel
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* DIR=/var/run/wpa_supplicant GROUP=0
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* (group can be either group name or gid)
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*
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* For UDP connections (default on Windows): The value will be ignored.
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* This variable is just used to select that the control interface is
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* to be created. The value can be set to, e.g., udp
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* (ctrl_interface=udp).
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*
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* For Windows Named Pipe: This value can be used to set the security
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* descriptor for controlling access to the control interface. Security
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* descriptor can be set using Security Descriptor String Format (see
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* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/security_descriptor_string_format.asp).
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* The descriptor string needs to be prefixed with SDDL=. For example,
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* ctrl_interface=SDDL=D: would set an empty DACL (which will reject
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* all connections).
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*/
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char *ctrl_interface;
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/**
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* ctrl_interface_group - Control interface group (DEPRECATED)
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*
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* This variable is only used for backwards compatibility. Group for
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* UNIX domain sockets should now be specified using GROUP=<group> in
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* ctrl_interface variable.
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*/
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char *ctrl_interface_group;
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/**
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* fast_reauth - EAP fast re-authentication (session resumption)
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*
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* By default, fast re-authentication is enabled for all EAP methods
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* that support it. This variable can be used to disable fast
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* re-authentication (by setting fast_reauth=0). Normally, there is no
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* need to disable fast re-authentication.
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*/
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int fast_reauth;
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#ifdef EAP_TLS_OPENSSL
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/**
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* opensc_engine_path - Path to the OpenSSL engine for opensc
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*
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* This is an OpenSSL specific configuration option for loading OpenSC
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* engine (engine_opensc.so); if %NULL, this engine is not loaded.
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*/
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char *opensc_engine_path;
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/**
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* pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
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*
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* This is an OpenSSL specific configuration option for loading PKCS#11
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* engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
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*/
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char *pkcs11_engine_path;
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/**
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* pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
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*
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* This is an OpenSSL specific configuration option for configuring
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* path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
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* module is not loaded.
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*/
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char *pkcs11_module_path;
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#endif /* EAP_TLS_OPENSSL */
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/**
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* driver_param - Driver interface parameters
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*
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* This text string is passed to the selected driver interface with the
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* optional struct wpa_driver_ops::set_param() handler. This can be
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* used to configure driver specific options without having to add new
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* driver interface functionality.
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*/
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char *driver_param;
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/**
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* dot11RSNAConfigPMKLifetime - Maximum lifetime of a PMK
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*
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* dot11 MIB variable for the maximum lifetime of a PMK in the PMK
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* cache (unit: seconds).
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*/
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unsigned int dot11RSNAConfigPMKLifetime;
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/**
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* dot11RSNAConfigPMKReauthThreshold - PMK re-authentication threshold
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*
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* dot11 MIB variable for the percentage of the PMK lifetime
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* that should expire before an IEEE 802.1X reauthentication occurs.
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*/
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unsigned int dot11RSNAConfigPMKReauthThreshold;
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/**
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* dot11RSNAConfigSATimeout - Security association timeout
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*
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* dot11 MIB variable for the maximum time a security association
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* shall take to set up (unit: seconds).
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*/
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unsigned int dot11RSNAConfigSATimeout;
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/**
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* update_config - Is wpa_supplicant allowed to update configuration
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*
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* This variable control whether wpa_supplicant is allow to re-write
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* its configuration with wpa_config_write(). If this is zero,
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* configuration data is only changed in memory and the external data
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* is not overriden. If this is non-zero, wpa_supplicant will update
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* the configuration data (e.g., a file) whenever configuration is
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* changed. This update may replace the old configuration which can
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* remove comments from it in case of a text file configuration.
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*/
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int update_config;
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/**
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* blobs - Configuration blobs
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*/
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struct wpa_config_blob *blobs;
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};
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/* Prototypes for common functions from config.c */
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void wpa_config_free(struct wpa_config *ssid);
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void wpa_config_free_ssid(struct wpa_ssid *ssid);
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struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id);
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struct wpa_ssid * wpa_config_add_network(struct wpa_config *config);
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int wpa_config_remove_network(struct wpa_config *config, int id);
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void wpa_config_set_network_defaults(struct wpa_ssid *ssid);
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int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
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int line);
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char * wpa_config_get(struct wpa_ssid *ssid, const char *var);
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char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var);
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void wpa_config_update_psk(struct wpa_ssid *ssid);
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int wpa_config_add_prio_network(struct wpa_config *config,
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struct wpa_ssid *ssid);
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const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
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const char *name);
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void wpa_config_set_blob(struct wpa_config *config,
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struct wpa_config_blob *blob);
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void wpa_config_free_blob(struct wpa_config_blob *blob);
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int wpa_config_remove_blob(struct wpa_config *config, const char *name);
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struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
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const char *driver_param);
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#ifndef CONFIG_NO_STDOUT_DEBUG
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void wpa_config_debug_dump_networks(struct wpa_config *config);
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#else /* CONFIG_NO_STDOUT_DEBUG */
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#define wpa_config_debug_dump_networks(c) do { } while (0)
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#endif /* CONFIG_NO_STDOUT_DEBUG */
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/* Prototypes for backend specific functions from the selected config_*.c */
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/**
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* wpa_config_read - Read and parse configuration database
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* @name: Name of the configuration (e.g., path and file name for the
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* configuration file)
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* Returns: Pointer to allocated configuration data or %NULL on failure
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*
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* This function reads configuration data, parses its contents, and allocates
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* data structures needed for storing configuration information. The allocated
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* data can be freed with wpa_config_free().
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*
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* Each configuration backend needs to implement this function.
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*/
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struct wpa_config * wpa_config_read(const char *name);
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/**
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* wpa_config_write - Write or update configuration data
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* @name: Name of the configuration (e.g., path and file name for the
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* configuration file)
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* @config: Configuration data from wpa_config_read()
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* Returns: 0 on success, -1 on failure
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*
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* This function write all configuration data into an external database (e.g.,
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* a text file) in a format that can be read with wpa_config_read(). This can
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* be used to allow wpa_supplicant to update its configuration, e.g., when a
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* new network is added or a password is changed.
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*
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* Each configuration backend needs to implement this function.
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*/
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int wpa_config_write(const char *name, struct wpa_config *config);
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#endif /* CONFIG_H */
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