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/*
* BSS table
* Copyright (c) 2009-2019, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef BSS_H
#define BSS_H
struct wpa_scan_res;
struct wpa_supplicant;
/**
* struct wpa_bss - BSS table
*
* This structure is used to store information about neighboring BSSes in
* generic format. It is mainly updated based on scan results from the driver.
*/
struct wpa_bss {
/** List entry for struct wpa_supplicant::bss */
struct dl_list list;
/** List entry for struct wpa_supplicant::bss_id */
struct dl_list list_id;
/** Unique identifier for this BSS entry */
unsigned int id;
/** Index of the last scan update */
unsigned int last_update_idx;
/** Information flags about the BSS/IBSS (WPA_BSS_*) */
unsigned int flags;
/** BSSID */
u8 bssid[ETH_ALEN];
/** SSID */
u8 ssid[SSID_MAX_LEN];
/** Length of SSID */
size_t ssid_len;
/** Frequency of the channel in MHz (e.g., 2412 = channel 1) */
int channel;
/** Beacon interval in TUs (host byte order) */
u16 beacon_int;
/** Capability information field in host byte order */
u16 caps;
/** Signal quality */
int qual;
/** Noise level */
int noise;
/** Signal level */
int level;
/** Timestamp of last Beacon/Probe Response frame */
u64 tsf;
/** Timestamp of parent aganist which it was taken */
u64 parent_tsf;
/** Time of the last update (i.e., Beacon or Probe Response RX) */
struct os_reltime last_update;
/** Length of the following IE field in octets (from Probe Response) */
size_t ie_len;
/** Length of the following Beacon IE field in octets */
size_t beacon_ie_len;
/* followed by ie_len octets of IEs */
/* followed by beacon_ie_len octets of IEs */
u8 ies[];
};
static inline const u8 * wpa_bss_ie_ptr(const struct wpa_bss *bss)
{
return bss->ies;
}
void wpa_bss_update_start(struct wpa_supplicant *wpa_s);
void wpa_bss_update_scan_res(struct wpa_supplicant *wpa_s,
struct wpa_scan_res *res,
struct os_reltime *fetch_time);
void wpa_bss_remove(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
const char *reason);
void wpa_bss_update_end(struct wpa_supplicant *wpa_s);
int wpa_bss_init(struct wpa_supplicant *wpa_s);
void wpa_bss_deinit(struct wpa_supplicant *wpa_s);
void wpa_bss_flush(struct wpa_supplicant *wpa_s);
struct wpa_bss * wpa_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid,
const u8 *ssid, size_t ssid_len);
struct wpa_bss * wpa_bss_get_bssid(struct wpa_supplicant *wpa_s,
const u8 *bssid);
const u8 * wpa_bss_get_ie(const struct wpa_bss *bss, u8 ie);
const u8 * wpa_bss_get_vendor_ie(const struct wpa_bss *bss, u32 vendor_type);
int wpa_bss_ext_capab(const struct wpa_bss *bss, unsigned int capab);
struct wpa_bss * wpa_bss_get_next_bss(struct wpa_supplicant *wpa_s,
struct wpa_bss *prev_bss);
void calculate_update_time(const struct os_reltime *fetch_time,
unsigned int age_ms,
struct os_reltime *update_time);
#endif /* BSS_H */
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