5b4a78b1f9
When wpa_supplicant needed to update the internal BSS table with the latest scan results from the driver, it fetched all BSSs and processed them all. This is unnecessary for cases where an update is needed only for a specific BSS. Optimize this by filtering out the unnecessary entries from the results. Signed-off-by: Jouni Malinen <quic_jouni@quicinc.com>
108 lines
4.7 KiB
C
108 lines
4.7 KiB
C
/*
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* WPA Supplicant - Scanning
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* Copyright (c) 2003-2014, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#ifndef SCAN_H
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#define SCAN_H
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/*
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* Noise floor values to use when we have signal strength
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* measurements, but no noise floor measurements. These values were
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* measured in an office environment with many APs.
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*/
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#define DEFAULT_NOISE_FLOOR_2GHZ (-89)
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#define DEFAULT_NOISE_FLOOR_5GHZ (-92)
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#define DEFAULT_NOISE_FLOOR_6GHZ (-92)
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/*
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* Channels with a great SNR can operate at full rate. What is a great SNR?
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* This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general
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* rule of thumb is that any SNR above 20 is good." This one
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* http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23
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* recommends 25 as a minimum SNR for 54 Mbps data rate. The estimates used in
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* scan_est_throughput() allow even smaller SNR values for the maximum rates
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* (21 for 54 Mbps, 22 for VHT80 MCS9, 24 for HT40 and HT20 MCS7). Use 25 as a
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* somewhat conservative value here.
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*/
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#define GREAT_SNR 25
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/*
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* IEEE Sts 802.11ax-2021, 9.4.2.161 (Transmit Power Envelope element) indicates
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* no max TX power limit if Maximum Transmit Power field is 63.5 dBm.
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* The default TX power if it is not constrained by Transmit Power Envelope
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* element.
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*/
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#define TX_POWER_NO_CONSTRAINT 64
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int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s);
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void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec);
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int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s,
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int sec, int usec);
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int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s);
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void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s);
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void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s);
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void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s);
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void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s,
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int scanning);
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struct wpa_driver_scan_params;
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int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s,
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struct wpa_driver_scan_params *params,
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bool default_ies, bool next);
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struct wpa_scan_results *
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wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s,
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struct scan_info *info, int new_scan,
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const u8 *bssid);
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int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s,
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const u8 *bssid);
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const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie);
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const u8 * wpa_scan_get_ml_ie(const struct wpa_scan_res *res, u8 type);
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const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
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u32 vendor_type);
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const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res,
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u32 vendor_type);
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struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
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u32 vendor_type);
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int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s,
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const u8 *bssid);
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void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec);
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void scan_only_handler(struct wpa_supplicant *wpa_s,
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struct wpa_scan_results *scan_res);
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int wpas_scan_scheduled(struct wpa_supplicant *wpa_s);
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struct wpa_driver_scan_params *
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wpa_scan_clone_params(const struct wpa_driver_scan_params *src);
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void wpa_scan_free_params(struct wpa_driver_scan_params *params);
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int wpas_start_pno(struct wpa_supplicant *wpa_s);
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int wpas_stop_pno(struct wpa_supplicant *wpa_s);
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void wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s);
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void wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s);
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void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s,
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unsigned int type);
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int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s,
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unsigned int type, const u8 *addr,
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const u8 *mask);
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int wpas_mac_addr_rand_scan_get_mask(struct wpa_supplicant *wpa_s,
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unsigned int type, u8 *mask);
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int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s);
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void scan_snr(struct wpa_scan_res *res);
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void scan_est_throughput(struct wpa_supplicant *wpa_s,
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struct wpa_scan_res *res);
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unsigned int wpas_get_est_tpt(const struct wpa_supplicant *wpa_s,
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const u8 *ies, size_t ies_len, int rate,
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int snr, int freq, enum chan_width *max_cw);
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void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s);
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int wpa_add_scan_freqs_list(struct wpa_supplicant *wpa_s,
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enum hostapd_hw_mode band,
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struct wpa_driver_scan_params *params,
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bool is_6ghz, bool only_6ghz_psc,
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bool exclude_radar);
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int wpas_channel_width_rssi_bump(const u8 *ies, size_t ies_len,
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enum chan_width cw);
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int wpas_adjust_snr_by_chanwidth(const u8 *ies, size_t ies_len,
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enum chan_width max_cw, int snr);
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#endif /* SCAN_H */
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