46f8976196
Prefer 6 GHz APs when estimated throughputs are equal with APs from the 2.4/5 GHz bands while selecting APs for connection. Also add a 6 GHz specific noise floor default value for the 6 GHz band (with the same value as was used for 5 GHz previously) to make this step clearer. Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
96 lines
4.1 KiB
C
96 lines
4.1 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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#define IS_2P4GHZ(n) (n >= 2412 && n <= 2484)
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#define IS_5GHZ(n) (n > 4000 && n < 5895)
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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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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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int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s);
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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_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 filter_scan_res(struct wpa_supplicant *wpa_s,
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struct wpa_scan_results *res);
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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);
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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);
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#endif /* SCAN_H */
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