NetBSD-5.0.2/dist/wpa/src/drivers/driver.h
/*
* WPA Supplicant - driver interface definition
* Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#ifndef DRIVER_H
#define DRIVER_H
#define WPA_SUPPLICANT_DRIVER_VERSION 3
#include "defs.h"
#define AUTH_ALG_OPEN_SYSTEM 0x01
#define AUTH_ALG_SHARED_KEY 0x02
#define AUTH_ALG_LEAP 0x04
#define IEEE80211_MODE_INFRA 0
#define IEEE80211_MODE_IBSS 1
#define IEEE80211_CAP_ESS 0x0001
#define IEEE80211_CAP_IBSS 0x0002
#define IEEE80211_CAP_PRIVACY 0x0010
#define SSID_MAX_WPA_IE_LEN 40
/**
* struct wpa_scan_result - Scan results (old structure)
* @bssid: BSSID
* @ssid: SSID
* @ssid_len: length of the ssid
* @wpa_ie: WPA IE
* @wpa_ie_len: length of the wpa_ie
* @rsn_ie: RSN IE
* @rsn_ie_len: length of the RSN IE
* @freq: frequency of the channel in MHz (e.g., 2412 = channel 1)
* @caps: capability information field in host byte order
* @qual: signal quality
* @noise: noise level
* @level: signal level
* @maxrate: maximum supported rate
* @mdie_present: Whether MDIE was included in Beacon/ProbeRsp frame
* @mdie: Mobility domain identifier IE (IEEE 802.11r MDIE) (starting from
* IE type field)
* @tsf: Timestamp
*
* This structure is used as a generic format for scan results from the
* driver. Each driver interface implementation is responsible for converting
* the driver or OS specific scan results into this format.
*
* This structure is the old data structure used for scan results. It is
* obsoleted by the new struct wpa_scan_res structure and the old version is
* only included for backwards compatibility with existing driver wrapper
* implementations. New implementations are encouraged to implement for struct
* wpa_scan_res. The old structure will be removed at some point.
*/
struct wpa_scan_result {
u8 bssid[ETH_ALEN];
u8 ssid[32];
size_t ssid_len;
u8 wpa_ie[SSID_MAX_WPA_IE_LEN];
size_t wpa_ie_len;
u8 rsn_ie[SSID_MAX_WPA_IE_LEN];
size_t rsn_ie_len;
int freq;
u16 caps;
int qual;
int noise;
int level;
int maxrate;
int mdie_present;
u8 mdie[5];
u64 tsf;
};
/**
* struct wpa_scan_res - Scan result for an BSS/IBSS
* @bssid: BSSID
* @freq: frequency of the channel in MHz (e.g., 2412 = channel 1)
* @beacon_int: beacon interval in TUs (host byte order)
* @caps: capability information field in host byte order
* @qual: signal quality
* @noise: noise level
* @level: signal level
* @tsf: Timestamp
* @ie_len: length of the following IE field in octets
*
* This structure is used as a generic format for scan results from the
* driver. Each driver interface implementation is responsible for converting
* the driver or OS specific scan results into this format.
*
* If the driver does not support reporting all IEs, the IE data structure is
* constructed of the IEs that are available. This field will also need to
* include SSID in IE format. All drivers are encouraged to be extended to
* report all IEs to make it easier to support future additions.
*/
struct wpa_scan_res {
u8 bssid[ETH_ALEN];
int freq;
u16 beacon_int;
u16 caps;
int qual;
int noise;
int level;
u64 tsf;
size_t ie_len;
/* followed by ie_len octets of IEs */
};
/**
* struct wpa_scan_results - Scan results
* @res: Array of pointers to allocated variable length scan result entries
* @num: Number of entries in the scan result array
*/
struct wpa_scan_results {
struct wpa_scan_res **res;
size_t num;
};
/**
* struct wpa_driver_associate_params - Association parameters
* Data for struct wpa_driver_ops::associate().
*/
struct wpa_driver_associate_params {
/**
* bssid - BSSID of the selected AP
* This can be %NULL, if ap_scan=2 mode is used and the driver is
* responsible for selecting with which BSS to associate. */
const u8 *bssid;
/**
* ssid - The selected SSID
*/
const u8 *ssid;
size_t ssid_len;
/**
* freq - Frequency of the channel the selected AP is using
* Frequency that the selected AP is using (in MHz as
* reported in the scan results)
*/
int freq;
/**
* wpa_ie - WPA information element for (Re)Association Request
* WPA information element to be included in (Re)Association
* Request (including information element id and length). Use
* of this WPA IE is optional. If the driver generates the WPA
* IE, it can use pairwise_suite, group_suite, and
* key_mgmt_suite to select proper algorithms. In this case,
* the driver has to notify wpa_supplicant about the used WPA
* IE by generating an event that the interface code will
* convert into EVENT_ASSOCINFO data (see below).
*
* When using WPA2/IEEE 802.11i, wpa_ie is used for RSN IE
* instead. The driver can determine which version is used by
* looking at the first byte of the IE (0xdd for WPA, 0x30 for
* WPA2/RSN).
*/
const u8 *wpa_ie;
/**
* wpa_ie_len - length of the wpa_ie
*/
size_t wpa_ie_len;
/* The selected pairwise/group cipher and key management
* suites. These are usually ignored if @wpa_ie is used. */
wpa_cipher pairwise_suite;
wpa_cipher group_suite;
wpa_key_mgmt key_mgmt_suite;
/**
* auth_alg - Allowed authentication algorithms
* Bit field of AUTH_ALG_*
*/
int auth_alg;
/**
* mode - Operation mode (infra/ibss) IEEE80211_MODE_*
*/
int mode;
/**
* wep_key - WEP keys for static WEP configuration
*/
const u8 *wep_key[4];
/**
* wep_key_len - WEP key length for static WEP configuration
*/
size_t wep_key_len[4];
/**
* wep_tx_keyidx - WEP TX key index for static WEP configuration
*/
int wep_tx_keyidx;
/**
* mgmt_frame_protection - IEEE 802.11w management frame protection
*/
enum {
NO_MGMT_FRAME_PROTECTION,
MGMT_FRAME_PROTECTION_OPTIONAL,
MGMT_FRAME_PROTECTION_REQUIRED
} mgmt_frame_protection;
/**
* ft_ies - IEEE 802.11r / FT information elements
* If the supplicant is using IEEE 802.11r (FT) and has the needed keys
* for fast transition, this parameter is set to include the IEs that
* are to be sent in the next FT Authentication Request message.
* update_ft_ies() handler is called to update the IEs for further
* FT messages in the sequence.
*
* The driver should use these IEs only if the target AP is advertising
* the same mobility domain as the one included in the MDIE here.
*
* In ap_scan=2 mode, the driver can use these IEs when moving to a new
* AP after the initial association. These IEs can only be used if the
* target AP is advertising support for FT and is using the same MDIE
* and SSID as the current AP.
*
* The driver is responsible for reporting the FT IEs received from the
* AP's response using wpa_supplicant_event() with EVENT_FT_RESPONSE
* type. update_ft_ies() handler will then be called with the FT IEs to
* include in the next frame in the authentication sequence.
*/
const u8 *ft_ies;
/**
* ft_ies_len - Length of ft_ies in bytes
*/
size_t ft_ies_len;
/**
* ft_md - FT Mobility domain (6 octets) (also included inside ft_ies)
*
* This value is provided to allow the driver interface easier access
* to the current mobility domain. This value is set to %NULL if no
* mobility domain is currently active.
*/
const u8 *ft_md;
/**
* passphrase - RSN passphrase for PSK
*
* This value is made available only for WPA/WPA2-Personal (PSK) and
* only for drivers that set WPA_DRIVER_FLAGS_4WAY_HANDSHAKE. This is
* the 8..63 character ASCII passphrase, if available. Please note that
* this can be %NULL if passphrase was not used to generate the PSK. In
* that case, the psk field must be used to fetch the PSK.
*/
const char *passphrase;
/**
* psk - RSN PSK (alternative for passphrase for PSK)
*
* This value is made available only for WPA/WPA2-Personal (PSK) and
* only for drivers that set WPA_DRIVER_FLAGS_4WAY_HANDSHAKE. This is
* the 32-octet (256-bit) PSK, if available. The driver wrapper should
* be prepared to handle %NULL value as an error.
*/
const u8 *psk;
};
/**
* struct wpa_driver_capa - Driver capability information
*/
struct wpa_driver_capa {
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA 0x00000001
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA2 0x00000002
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK 0x00000004
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK 0x00000008
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA_NONE 0x00000010
#define WPA_DRIVER_CAPA_KEY_MGMT_FT 0x00000020
#define WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK 0x00000040
unsigned int key_mgmt;
#define WPA_DRIVER_CAPA_ENC_WEP40 0x00000001
#define WPA_DRIVER_CAPA_ENC_WEP104 0x00000002
#define WPA_DRIVER_CAPA_ENC_TKIP 0x00000004
#define WPA_DRIVER_CAPA_ENC_CCMP 0x00000008
unsigned int enc;
#define WPA_DRIVER_AUTH_OPEN 0x00000001
#define WPA_DRIVER_AUTH_SHARED 0x00000002
#define WPA_DRIVER_AUTH_LEAP 0x00000004
unsigned int auth;
/* Driver generated WPA/RSN IE */
#define WPA_DRIVER_FLAGS_DRIVER_IE 0x00000001
#define WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC 0x00000002
#define WPA_DRIVER_FLAGS_USER_SPACE_MLME 0x00000004
/* Driver takes care of RSN 4-way handshake internally; PMK is configured with
* struct wpa_driver_ops::set_key using alg = WPA_ALG_PMK */
#define WPA_DRIVER_FLAGS_4WAY_HANDSHAKE 0x00000008
unsigned int flags;
};
#define WPA_CHAN_W_SCAN 0x00000001
#define WPA_CHAN_W_ACTIVE_SCAN 0x00000002
#define WPA_CHAN_W_IBSS 0x00000004
struct wpa_channel_data {
short chan; /* channel number (IEEE 802.11) */
short freq; /* frequency in MHz */
int flag; /* flag for user space use (WPA_CHAN_*) */
};
#define WPA_RATE_ERP 0x00000001
#define WPA_RATE_BASIC 0x00000002
#define WPA_RATE_PREAMBLE2 0x00000004
#define WPA_RATE_SUPPORTED 0x00000010
#define WPA_RATE_OFDM 0x00000020
#define WPA_RATE_CCK 0x00000040
#define WPA_RATE_MANDATORY 0x00000100
struct wpa_rate_data {
int rate; /* rate in 100 kbps */
int flags; /* WPA_RATE_ flags */
};
typedef enum {
WPA_MODE_IEEE80211B,
WPA_MODE_IEEE80211G,
WPA_MODE_IEEE80211A,
NUM_WPA_MODES
} wpa_hw_mode;
struct wpa_hw_modes {
wpa_hw_mode mode;
int num_channels;
struct wpa_channel_data *channels;
int num_rates;
struct wpa_rate_data *rates;
};
struct ieee80211_rx_status {
int channel;
int ssi;
};
/**
* struct wpa_driver_ops - Driver interface API definition
*
* This structure defines the API that each driver interface needs to implement
* for core wpa_supplicant code. All driver specific functionality is captured
* in this wrapper.
*/
struct wpa_driver_ops {
/** Name of the driver interface */
const char *name;
/** One line description of the driver interface */
const char *desc;
/**
* get_bssid - Get the current BSSID
* @priv: private driver interface data
* @bssid: buffer for BSSID (ETH_ALEN = 6 bytes)
*
* Returns: 0 on success, -1 on failure
*
* Query kernel driver for the current BSSID and copy it to bssid.
* Setting bssid to 00:00:00:00:00:00 is recommended if the STA is not
* associated.
*/
int (*get_bssid)(void *priv, u8 *bssid);
/**
* get_ssid - Get the current SSID
* @priv: private driver interface data
* @ssid: buffer for SSID (at least 32 bytes)
*
* Returns: Length of the SSID on success, -1 on failure
*
* Query kernel driver for the current SSID and copy it to ssid.
* Returning zero is recommended if the STA is not associated.
*
* Note: SSID is an array of octets, i.e., it is not nul terminated and
* can, at least in theory, contain control characters (including nul)
* and as such, should be processed as binary data, not a printable
* string.
*/
int (*get_ssid)(void *priv, u8 *ssid);
/**
* set_wpa - Enable/disable WPA support (OBSOLETE)
* @priv: private driver interface data
* @enabled: 1 = enable, 0 = disable
*
* Returns: 0 on success, -1 on failure
*
* Note: This function is included for backwards compatibility. This is
* called only just after init and just before deinit, so these
* functions can be used to implement same functionality and the driver
* interface need not define this function.
*
* Configure the kernel driver to enable/disable WPA support. This may
* be empty function, if WPA support is always enabled. Common
* configuration items are WPA IE (clearing it when WPA support is
* disabled), Privacy flag configuration for capability field (note:
* this the value need to set in associate handler to allow plaintext
* mode to be used) when trying to associate with, roaming mode (can
* allow wpa_supplicant to control roaming if ap_scan=1 is used;
* however, drivers can also implement roaming if desired, especially
* ap_scan=2 mode is used for this).
*/
int (*set_wpa)(void *priv, int enabled);
/**
* set_key - Configure encryption key
* @priv: private driver interface data
* @alg: encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
* %WPA_ALG_TKIP, %WPA_ALG_CCMP, %WPA_ALG_IGTK, %WPA_ALG_PMK);
* %WPA_ALG_NONE clears the key.
* @addr: address of the peer STA or ff:ff:ff:ff:ff:ff for
* broadcast/default keys
* @key_idx: key index (0..3), usually 0 for unicast keys; 0..4095 for
* IGTK
* @set_tx: configure this key as the default Tx key (only used when
* driver does not support separate unicast/individual key
* @seq: sequence number/packet number, seq_len octets, the next
* packet number to be used for in replay protection; configured
* for Rx keys (in most cases, this is only used with broadcast
* keys and set to zero for unicast keys)
* @seq_len: length of the seq, depends on the algorithm:
* TKIP: 6 octets, CCMP: 6 octets, IGTK: 6 octets
* @key: key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
* 8-byte Rx Mic Key
* @key_len: length of the key buffer in octets (WEP: 5 or 13,
* TKIP: 32, CCMP: 16, IGTK: 16)
*
* Returns: 0 on success, -1 on failure
*
* Configure the given key for the kernel driver. If the driver
* supports separate individual keys (4 default keys + 1 individual),
* addr can be used to determine whether the key is default or
* individual. If only 4 keys are supported, the default key with key
* index 0 is used as the individual key. STA must be configured to use
* it as the default Tx key (set_tx is set) and accept Rx for all the
* key indexes. In most cases, WPA uses only key indexes 1 and 2 for
* broadcast keys, so key index 0 is available for this kind of
* configuration.
*
* Please note that TKIP keys include separate TX and RX MIC keys and
* some drivers may expect them in different order than wpa_supplicant
* is using. If the TX/RX keys are swapped, all TKIP encrypted packets
* will tricker Michael MIC errors. This can be fixed by changing the
* order of MIC keys by swapping te bytes 16..23 and 24..31 of the key
* in driver_*.c set_key() implementation, see driver_ndis.c for an
* example on how this can be done.
*/
int (*set_key)(void *priv, wpa_alg alg, const u8 *addr,
int key_idx, int set_tx, const u8 *seq, size_t seq_len,
const u8 *key, size_t key_len);
/**
* init - Initialize driver interface
* @ctx: context to be used when calling wpa_supplicant functions,
* e.g., wpa_supplicant_event()
* @ifname: interface name, e.g., wlan0
*
* Returns: Pointer to private data, %NULL on failure
*
* Initialize driver interface, including event processing for kernel
* driver events (e.g., associated, scan results, Michael MIC failure).
* This function can allocate a private configuration data area for
* @ctx, file descriptor, interface name, etc. information that may be
* needed in future driver operations. If this is not used, non-NULL
* value will need to be returned because %NULL is used to indicate
* failure. The returned value will be used as 'void *priv' data for
* all other driver_ops functions.
*
* The main event loop (eloop.c) of wpa_supplicant can be used to
* register callback for read sockets (eloop_register_read_sock()).
*
* See below for more information about events and
* wpa_supplicant_event() function.
*/
void * (*init)(void *ctx, const char *ifname);
/**
* deinit - Deinitialize driver interface
* @priv: private driver interface data from init()
*
* Shut down driver interface and processing of driver events. Free
* private data buffer if one was allocated in init() handler.
*/
void (*deinit)(void *priv);
/**
* set_param - Set driver configuration parameters
* @priv: private driver interface data from init()
* @param: driver specific configuration parameters
*
* Returns: 0 on success, -1 on failure
*
* Optional handler for notifying driver interface about configuration
* parameters (driver_param).
*/
int (*set_param)(void *priv, const char *param);
/**
* set_countermeasures - Enable/disable TKIP countermeasures
* @priv: private driver interface data
* @enabled: 1 = countermeasures enabled, 0 = disabled
*
* Returns: 0 on success, -1 on failure
*
* Configure TKIP countermeasures. When these are enabled, the driver
* should drop all received and queued frames that are using TKIP.
*/
int (*set_countermeasures)(void *priv, int enabled);
/**
* set_drop_unencrypted - Enable/disable unencrypted frame filtering
* @priv: private driver interface data
* @enabled: 1 = unencrypted Tx/Rx frames will be dropped, 0 = disabled
*
* Returns: 0 on success, -1 on failure
*
* Configure the driver to drop all non-EAPOL frames (both receive and
* transmit paths). Unencrypted EAPOL frames (ethertype 0x888e) must
* still be allowed for key negotiation.
*/
int (*set_drop_unencrypted)(void *priv, int enabled);
/**
* scan - Request the driver to initiate scan
* @priv: private driver interface data
* @ssid: specific SSID to scan for (ProbeReq) or %NULL to scan for
* all SSIDs (either active scan with broadcast SSID or passive
* scan
* @ssid_len: length of the SSID
*
* Returns: 0 on success, -1 on failure
*
* Once the scan results are ready, the driver should report scan
* results event for wpa_supplicant which will eventually request the
* results with wpa_driver_get_scan_results().
*/
int (*scan)(void *priv, const u8 *ssid, size_t ssid_len);
/**
* get_scan_results - Fetch the latest scan results (old version)
* @priv: private driver interface data
* @results: pointer to buffer for scan results
* @max_size: maximum number of entries (buffer size)
*
* Returns: Number of scan result entries used on success, -1 on
* failure
*
* If scan results include more than max_size BSSes, max_size will be
* returned and the remaining entries will not be included in the
* buffer.
*
* This function is depracated. New driver wrapper implementations
* should implement support for get_scan_results2().
*/
int (*get_scan_results)(void *priv,
struct wpa_scan_result *results,
size_t max_size);
/**
* deauthenticate - Request driver to deauthenticate
* @priv: private driver interface data
* @addr: peer address (BSSID of the AP)
* @reason_code: 16-bit reason code to be sent in the deauthentication
* frame
*
* Returns: 0 on success, -1 on failure
*/
int (*deauthenticate)(void *priv, const u8 *addr, int reason_code);
/**
* disassociate - Request driver to disassociate
* @priv: private driver interface data
* @addr: peer address (BSSID of the AP)
* @reason_code: 16-bit reason code to be sent in the disassociation
* frame
*
* Returns: 0 on success, -1 on failure
*/
int (*disassociate)(void *priv, const u8 *addr, int reason_code);
/**
* associate - Request driver to associate
* @priv: private driver interface data
* @params: association parameters
*
* Returns: 0 on success, -1 on failure
*/
int (*associate)(void *priv,
struct wpa_driver_associate_params *params);
/**
* set_auth_alg - Set IEEE 802.11 authentication algorithm
* @priv: private driver interface data
* @auth_alg: bit field of AUTH_ALG_*
*
* If the driver supports more than one authentication algorithm at the
* same time, it should configure all supported algorithms. If not, one
* algorithm needs to be selected arbitrarily. Open System
* authentication should be ok for most cases and it is recommended to
* be used if other options are not supported. Static WEP configuration
* may also use Shared Key authentication and LEAP requires its own
* algorithm number. For LEAP, user can make sure that only one
* algorithm is used at a time by configuring LEAP as the only
* supported EAP method. This information is also available in
* associate() params, so set_auth_alg may not be needed in case of
* most drivers.
*
* Returns: 0 on success, -1 on failure
*/
int (*set_auth_alg)(void *priv, int auth_alg);
/**
* add_pmkid - Add PMKSA cache entry to the driver
* @priv: private driver interface data
* @bssid: BSSID for the PMKSA cache entry
* @pmkid: PMKID for the PMKSA cache entry
*
* Returns: 0 on success, -1 on failure
*
* This function is called when a new PMK is received, as a result of
* either normal authentication or RSN pre-authentication.
*
* If the driver generates RSN IE, i.e., it does not use wpa_ie in
* associate(), add_pmkid() can be used to add new PMKSA cache entries
* in the driver. If the driver uses wpa_ie from wpa_supplicant, this
* driver_ops function does not need to be implemented. Likewise, if
* the driver does not support WPA, this function is not needed.
*/
int (*add_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);
/**
* remove_pmkid - Remove PMKSA cache entry to the driver
* @priv: private driver interface data
* @bssid: BSSID for the PMKSA cache entry
* @pmkid: PMKID for the PMKSA cache entry
*
* Returns: 0 on success, -1 on failure
*
* This function is called when the supplicant drops a PMKSA cache
* entry for any reason.
*
* If the driver generates RSN IE, i.e., it does not use wpa_ie in
* associate(), remove_pmkid() can be used to synchronize PMKSA caches
* between the driver and wpa_supplicant. If the driver uses wpa_ie
* from wpa_supplicant, this driver_ops function does not need to be
* implemented. Likewise, if the driver does not support WPA, this
* function is not needed.
*/
int (*remove_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);
/**
* flush_pmkid - Flush PMKSA cache
* @priv: private driver interface data
*
* Returns: 0 on success, -1 on failure
*
* This function is called when the supplicant drops all PMKSA cache
* entries for any reason.
*
* If the driver generates RSN IE, i.e., it does not use wpa_ie in
* associate(), remove_pmkid() can be used to synchronize PMKSA caches
* between the driver and wpa_supplicant. If the driver uses wpa_ie
* from wpa_supplicant, this driver_ops function does not need to be
* implemented. Likewise, if the driver does not support WPA, this
* function is not needed.
*/
int (*flush_pmkid)(void *priv);
/**
* flush_pmkid - Flush PMKSA cache
* @priv: private driver interface data
*
* Returns: 0 on success, -1 on failure
*
* Get driver/firmware/hardware capabilities.
*/
int (*get_capa)(void *priv, struct wpa_driver_capa *capa);
/**
* poll - Poll driver for association information
* @priv: private driver interface data
*
* This is an option callback that can be used when the driver does not
* provide event mechanism for association events. This is called when
* receiving WPA EAPOL-Key messages that require association
* information. The driver interface is supposed to generate associnfo
* event before returning from this callback function. In addition, the
* driver interface should generate an association event after having
* sent out associnfo.
*/
void (*poll)(void *priv);
/**
* get_ifname - Get interface name
* @priv: private driver interface data
*
* Returns: Pointer to the interface name. This can differ from the
* interface name used in init() call.
*
* This optional function can be used to allow the driver interface to
* replace the interface name with something else, e.g., based on an
* interface mapping from a more descriptive name.
*/
const char * (*get_ifname)(void *priv);
/**
* get_mac_addr - Get own MAC address
* @priv: private driver interface data
*
* Returns: Pointer to own MAC address or %NULL on failure
*
* This optional function can be used to get the own MAC address of the
* device from the driver interface code. This is only needed if the
* l2_packet implementation for the OS does not provide easy access to
* a MAC address. */
const u8 * (*get_mac_addr)(void *priv);
/**
* send_eapol - Optional function for sending EAPOL packets
* @priv: private driver interface data
* @dest: Destination MAC address
* @proto: Ethertype
* @data: EAPOL packet starting with IEEE 802.1X header
* @data_len: Size of the EAPOL packet
*
* Returns: 0 on success, -1 on failure
*
* This optional function can be used to override l2_packet operations
* with driver specific functionality. If this function pointer is set,
* l2_packet module is not used at all and the driver interface code is
* responsible for receiving and sending all EAPOL packets. The
* received EAPOL packets are sent to core code by calling
* wpa_supplicant_rx_eapol(). The driver interface is required to
* implement get_mac_addr() handler if send_eapol() is used.
*/
int (*send_eapol)(void *priv, const u8 *dest, u16 proto,
const u8 *data, size_t data_len);
/**
* set_operstate - Sets device operating state to DORMANT or UP
* @priv: private driver interface data
* @state: 0 = dormant, 1 = up
* Returns: 0 on success, -1 on failure
*
* This is an optional function that can be used on operating systems
* that support a concept of controlling network device state from user
* space applications. This function, if set, gets called with
* state = 1 when authentication has been completed and with state = 0
* when connection is lost.
*/
int (*set_operstate)(void *priv, int state);
/**
* mlme_setprotection - MLME-SETPROTECTION.request primitive
* @priv: Private driver interface data
* @addr: Address of the station for which to set protection (may be
* %NULL for group keys)
* @protect_type: MLME_SETPROTECTION_PROTECT_TYPE_*
* @key_type: MLME_SETPROTECTION_KEY_TYPE_*
* Returns: 0 on success, -1 on failure
*
* This is an optional function that can be used to set the driver to
* require protection for Tx and/or Rx frames. This uses the layer
* interface defined in IEEE 802.11i-2004 clause 10.3.22.1
* (MLME-SETPROTECTION.request). Many drivers do not use explicit
* set protection operation; instead, they set protection implicitly
* based on configured keys.
*/
int (*mlme_setprotection)(void *priv, const u8 *addr, int protect_type,
int key_type);
/**
* get_hw_feature_data - Get hardware support data (channels and rates)
* @priv: Private driver interface data
* @num_modes: Variable for returning the number of returned modes
* flags: Variable for returning hardware feature flags
* Returns: Pointer to allocated hardware data on success or %NULL on
* failure. Caller is responsible for freeing this.
*
* This function is only needed for drivers that export MLME
* (management frame processing) to wpa_supplicant.
*/
struct wpa_hw_modes * (*get_hw_feature_data)(void *priv,
u16 *num_modes,
u16 *flags);
/**
* set_channel - Set channel
* @priv: Private driver interface data
* @phymode: WPA_MODE_IEEE80211B, ..
* @chan: IEEE 802.11 channel number
* @freq: Frequency of the channel in MHz
* Returns: 0 on success, -1 on failure
*
* This function is only needed for drivers that export MLME
* (management frame processing) to wpa_supplicant.
*/
int (*set_channel)(void *priv, wpa_hw_mode phymode, int chan,
int freq);
/**
* set_ssid - Set SSID
* @priv: Private driver interface data
* @ssid: SSID
* @ssid_len: SSID length
* Returns: 0 on success, -1 on failure
*
* This function is only needed for drivers that export MLME
* (management frame processing) to wpa_supplicant.
*/
int (*set_ssid)(void *priv, const u8 *ssid, size_t ssid_len);
/**
* set_bssid - Set BSSID
* @priv: Private driver interface data
* @bssid: BSSID
* Returns: 0 on success, -1 on failure
*
* This function is only needed for drivers that export MLME
* (management frame processing) to wpa_supplicant.
*/
int (*set_bssid)(void *priv, const u8 *bssid);
/**
* send_mlme - Send management frame from MLME
* @priv: Private driver interface data
* @data: IEEE 802.11 management frame with IEEE 802.11 header
* @data_len: Size of the management frame
* Returns: 0 on success, -1 on failure
*
* This function is only needed for drivers that export MLME
* (management frame processing) to wpa_supplicant.
*/
int (*send_mlme)(void *priv, const u8 *data, size_t data_len);
/**
* mlme_add_sta - Add a STA entry into the driver/netstack
* @priv: Private driver interface data
* @addr: MAC address of the STA (e.g., BSSID of the AP)
* @supp_rates: Supported rate set (from (Re)AssocResp); in IEEE 802.11
* format (one octet per rate, 1 = 0.5 Mbps)
* @supp_rates_len: Number of entries in supp_rates
* Returns: 0 on success, -1 on failure
*
* This function is only needed for drivers that export MLME
* (management frame processing) to wpa_supplicant. When the MLME code
* completes association with an AP, this function is called to
* configure the driver/netstack with a STA entry for data frame
* processing (TX rate control, encryption/decryption).
*/
int (*mlme_add_sta)(void *priv, const u8 *addr, const u8 *supp_rates,
size_t supp_rates_len);
/**
* mlme_remove_sta - Remove a STA entry from the driver/netstack
* @priv: Private driver interface data
* @addr: MAC address of the STA (e.g., BSSID of the AP)
* Returns: 0 on success, -1 on failure
*
* This function is only needed for drivers that export MLME
* (management frame processing) to wpa_supplicant.
*/
int (*mlme_remove_sta)(void *priv, const u8 *addr);
/**
* update_ft_ies - Update FT (IEEE 802.11r) IEs
* @priv: Private driver interface data
* @md: Mobility domain (2 octets) (also included inside ies)
* @ies: FT IEs (MDIE, FTIE, ...) or %NULL to remove IEs
* @ies_len: Length of FT IEs in bytes
* Returns: 0 on success, -1 on failure
*
* The supplicant uses this callback to let the driver know that keying
* material for FT is available and that the driver can use the
* provided IEs in the next message in FT authentication sequence.
*
* This function is only needed for driver that support IEEE 802.11r
* (Fast BSS Transition).
*/
int (*update_ft_ies)(void *priv, const u8 *md, const u8 *ies,
size_t ies_len);
/**
* send_ft_action - Send FT Action frame (IEEE 802.11r)
* @priv: Private driver interface data
* @action: Action field value
* @target_ap: Target AP address
* @ies: FT IEs (MDIE, FTIE, ...) (FT Request action frame body)
* @ies_len: Length of FT IEs in bytes
* Returns: 0 on success, -1 on failure
*
* The supplicant uses this callback to request the driver to transmit
* an FT Action frame (action category 6) for over-the-DS fast BSS
* transition.
*/
int (*send_ft_action)(void *priv, u8 action, const u8 *target_ap,
const u8 *ies, size_t ies_len);
/**
* get_scan_results2 - Fetch the latest scan results
* @priv: private driver interface data
*
* Returns: Allocated buffer of scan results (caller is responsible for
* freeing the data structure) on success, NULL on failure
*/
struct wpa_scan_results * (*get_scan_results2)(void *priv);
/**
* * set_probe_req_ie - Set information element(s) for Probe Request
* @priv: private driver interface data
* @ies: Information elements to append or %NULL to remove extra IEs
* @ies_len: Length of the IE buffer in octets
* Returns: 0 on success, -1 on failure
*/
int (*set_probe_req_ie)(void *, const u8 *ies, size_t ies_len);
};
/**
* enum wpa_event_type - Event type for wpa_supplicant_event() calls
*/
typedef enum wpa_event_type {
/**
* EVENT_ASSOC - Association completed
*
* This event needs to be delivered when the driver completes IEEE
* 802.11 association or reassociation successfully.
* wpa_driver_ops::get_bssid() is expected to provide the current BSSID
* after this event has been generated. In addition, optional
* EVENT_ASSOCINFO may be generated just before EVENT_ASSOC to provide
* more information about the association. If the driver interface gets
* both of these events at the same time, it can also include the
* assoc_info data in EVENT_ASSOC call.
*/
EVENT_ASSOC,
/**
* EVENT_DISASSOC - Association lost
*
* This event should be called when association is lost either due to
* receiving deauthenticate or disassociate frame from the AP or when
* sending either of these frames to the current AP.
*/
EVENT_DISASSOC,
/**
* EVENT_MICHAEL_MIC_FAILURE - Michael MIC (TKIP) detected
*
* This event must be delivered when a Michael MIC error is detected by
* the local driver. Additional data for event processing is
* provided with union wpa_event_data::michael_mic_failure. This
* information is used to request new encyption key and to initiate
* TKIP countermeasures if needed.
*/
EVENT_MICHAEL_MIC_FAILURE,
/**
* EVENT_SCAN_RESULTS - Scan results available
*
* This event must be called whenever scan results are available to be
* fetched with struct wpa_driver_ops::get_scan_results(). This event
* is expected to be used some time after struct wpa_driver_ops::scan()
* is called. If the driver provides an unsolicited event when the scan
* has been completed, this event can be used to trigger
* EVENT_SCAN_RESULTS call. If such event is not available from the
* driver, the driver wrapper code is expected to use a registered
* timeout to generate EVENT_SCAN_RESULTS call after the time that the
* scan is expected to be completed.
*/
EVENT_SCAN_RESULTS,
/**
* EVENT_ASSOCINFO - Report optional extra information for association
*
* This event can be used to report extra association information for
* EVENT_ASSOC processing. This extra information includes IEs from
* association frames and Beacon/Probe Response frames in union
* wpa_event_data::assoc_info. EVENT_ASSOCINFO must be send just before
* EVENT_ASSOC. Alternatively, the driver interface can include
* assoc_info data in the EVENT_ASSOC call if it has all the
* information available at the same point.
*/
EVENT_ASSOCINFO,
/**
* EVENT_INTERFACE_STATUS - Report interface status changes
*
* This optional event can be used to report changes in interface
* status (interface added/removed) using union
* wpa_event_data::interface_status. This can be used to trigger
* wpa_supplicant to stop and re-start processing for the interface,
* e.g., when a cardbus card is ejected/inserted.
*/
EVENT_INTERFACE_STATUS,
/**
* EVENT_PMKID_CANDIDATE - Report a candidate AP for pre-authentication
*
* This event can be used to inform wpa_supplicant about candidates for
* RSN (WPA2) pre-authentication. If wpa_supplicant is not responsible
* for scan request (ap_scan=2 mode), this event is required for
* pre-authentication. If wpa_supplicant is performing scan request
* (ap_scan=1), this event is optional since scan results can be used
* to add pre-authentication candidates. union
* wpa_event_data::pmkid_candidate is used to report the BSSID of the
* candidate and priority of the candidate, e.g., based on the signal
* strength, in order to try to pre-authenticate first with candidates
* that are most likely targets for re-association.
*
* EVENT_PMKID_CANDIDATE can be called whenever the driver has updates
* on the candidate list. In addition, it can be called for the current
* AP and APs that have existing PMKSA cache entries. wpa_supplicant
* will automatically skip pre-authentication in cases where a valid
* PMKSA exists. When more than one candidate exists, this event should
* be generated once for each candidate.
*
* Driver will be notified about successful pre-authentication with
* struct wpa_driver_ops::add_pmkid() calls.
*/
EVENT_PMKID_CANDIDATE,
/**
* EVENT_STKSTART - Request STK handshake (MLME-STKSTART.request)
*
* This event can be used to inform wpa_supplicant about desire to set
* up secure direct link connection between two stations as defined in
* IEEE 802.11e with a new PeerKey mechanism that replaced the original
* STAKey negotiation. The caller will need to set peer address for the
* event.
*/
EVENT_STKSTART,
/**
* EVENT_FT_RESPONSE - Report FT (IEEE 802.11r) response IEs
*
* The driver is expected to report the received FT IEs from
* FT authentication sequence from the AP. The FT IEs are included in
* the extra information in union wpa_event_data::ft_ies.
*/
EVENT_FT_RESPONSE
} wpa_event_type;
/**
* union wpa_event_data - Additional data for wpa_supplicant_event() calls
*/
union wpa_event_data {
/**
* struct assoc_info - Data for EVENT_ASSOC and EVENT_ASSOCINFO events
*
* This structure is optional for EVENT_ASSOC calls and required for
* EVENT_ASSOCINFO calls. By using EVENT_ASSOC with this data, the
* driver interface does not need to generate separate EVENT_ASSOCINFO
* calls.
*/
struct assoc_info {
/**
* req_ies - (Re)Association Request IEs
*
* If the driver generates WPA/RSN IE, this event data must be
* returned for WPA handshake to have needed information. If
* wpa_supplicant-generated WPA/RSN IE is used, this
* information event is optional.
*
* This should start with the first IE (fixed fields before IEs
* are not included).
*/
u8 *req_ies;
/**
* req_ies_len - Length of req_ies in bytes
*/
size_t req_ies_len;
/**
* resp_ies - (Re)Association Response IEs
*
* Optional association data from the driver. This data is not
* required WPA, but may be useful for some protocols and as
* such, should be reported if this is available to the driver
* interface.
*
* This should start with the first IE (fixed fields before IEs
* are not included).
*/
u8 *resp_ies;
/**
* resp_ies_len - Length of resp_ies in bytes
*/
size_t resp_ies_len;
/**
* beacon_ies - Beacon or Probe Response IEs
*
* Optional Beacon/ProbeResp data: IEs included in Beacon or
* Probe Response frames from the current AP (i.e., the one
* that the client just associated with). This information is
* used to update WPA/RSN IE for the AP. If this field is not
* set, the results from previous scan will be used. If no
* data for the new AP is found, scan results will be requested
* again (without scan request). At this point, the driver is
* expected to provide WPA/RSN IE for the AP (if WPA/WPA2 is
* used).
*
* This should start with the first IE (fixed fields before IEs
* are not included).
*/
u8 *beacon_ies;
/**
* beacon_ies_len - Length of beacon_ies */
size_t beacon_ies_len;
} assoc_info;
/**
* struct michael_mic_failure - Data for EVENT_MICHAEL_MIC_FAILURE
*/
struct michael_mic_failure {
int unicast;
} michael_mic_failure;
/**
* struct interface_status - Data for EVENT_INTERFACE_STATUS
*/
struct interface_status {
char ifname[100];
enum {
EVENT_INTERFACE_ADDED, EVENT_INTERFACE_REMOVED
} ievent;
} interface_status;
/**
* struct pmkid_candidate - Data for EVENT_PMKID_CANDIDATE
*/
struct pmkid_candidate {
/** BSSID of the PMKID candidate */
u8 bssid[ETH_ALEN];
/** Smaller the index, higher the priority */
int index;
/** Whether RSN IE includes pre-authenticate flag */
int preauth;
} pmkid_candidate;
/**
* struct stkstart - Data for EVENT_STKSTART
*/
struct stkstart {
u8 peer[ETH_ALEN];
} stkstart;
/**
* struct ft_ies - FT information elements (EVENT_FT_RESPONSE)
*
* During FT (IEEE 802.11r) authentication sequence, the driver is
* expected to use this event to report received FT IEs (MDIE, FTIE,
* RSN IE, TIE, possible resource request) to the supplicant. The FT
* IEs for the next message will be delivered through the
* struct wpa_driver_ops::update_ft_ies() callback.
*/
struct ft_ies {
const u8 *ies;
size_t ies_len;
int ft_action;
u8 target_ap[ETH_ALEN];
} ft_ies;
};
/**
* wpa_supplicant_event - Report a driver event for wpa_supplicant
* @ctx: Context pointer (wpa_s); this is the ctx variable registered
* with struct wpa_driver_ops::init()
* @event: event type (defined above)
* @data: possible extra data for the event
*
* Driver wrapper code should call this function whenever an event is received
* from the driver.
*/
void wpa_supplicant_event(void *ctx, wpa_event_type event,
union wpa_event_data *data);
/**
* wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
* @ctx: Context pointer (wpa_s); this is the ctx variable registered
* with struct wpa_driver_ops::init()
* @src_addr: Source address of the EAPOL frame
* @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
* @len: Length of the EAPOL data
*
* This function is called for each received EAPOL frame. Most driver
* interfaces rely on more generic OS mechanism for receiving frames through
* l2_packet, but if such a mechanism is not available, the driver wrapper may
* take care of received EAPOL frames and deliver them to the core supplicant
* code by calling this function.
*/
void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
const u8 *buf, size_t len);
void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
struct ieee80211_rx_status *rx_status);
void wpa_supplicant_sta_free_hw_features(struct wpa_hw_modes *hw_features,
size_t num_hw_features);
const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie);
#define WPA_IE_VENDOR_TYPE 0x0050f201
const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
u32 vendor_type);
int wpa_scan_get_max_rate(const struct wpa_scan_res *res);
void wpa_scan_results_free(struct wpa_scan_results *res);
void wpa_scan_sort_results(struct wpa_scan_results *res);
#endif /* DRIVER_H */