1 /* 2 * WPA Supplicant - Scanning 3 * Copyright (c) 2003-2014, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #ifndef SCAN_H 10 #define SCAN_H 11 12 /* 13 * Noise floor values to use when we have signal strength 14 * measurements, but no noise floor measurements. These values were 15 * measured in an office environment with many APs. 16 */ 17 #define DEFAULT_NOISE_FLOOR_2GHZ (-89) 18 #define DEFAULT_NOISE_FLOOR_5GHZ (-92) 19 #define DEFAULT_NOISE_FLOOR_6GHZ (-92) 20 21 /* 22 * Channels with a great SNR can operate at full rate. What is a great SNR? 23 * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general 24 * rule of thumb is that any SNR above 20 is good." This one 25 * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23 26 * recommends 25 as a minimum SNR for 54 Mbps data rate. The estimates used in 27 * scan_est_throughput() allow even smaller SNR values for the maximum rates 28 * (21 for 54 Mbps, 22 for VHT80 MCS9, 24 for HT40 and HT20 MCS7). Use 25 as a 29 * somewhat conservative value here. 30 */ 31 #define GREAT_SNR 25 32 33 /* 34 * IEEE Sts 802.11ax-2021, 9.4.2.161 (Transmit Power Envelope element) indicates 35 * no max TX power limit if Maximum Transmit Power field is 63.5 dBm. 36 * The default TX power if it is not constrained by Transmit Power Envelope 37 * element. 38 */ 39 #define TX_POWER_NO_CONSTRAINT 64 40 41 int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s); 42 void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec); 43 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s, 44 int sec, int usec); 45 int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s); 46 void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s); 47 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s); 48 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s); 49 void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s, 50 int scanning); 51 struct wpa_driver_scan_params; 52 int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s, 53 struct wpa_driver_scan_params *params, 54 bool default_ies, bool next); 55 struct wpa_scan_results * 56 wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s, 57 struct scan_info *info, int new_scan, 58 const u8 *bssid); 59 int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s, 60 const u8 *bssid); 61 const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie); 62 const u8 * wpa_scan_get_ml_ie(const struct wpa_scan_res *res, u8 type); 63 const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res, 64 u32 vendor_type); 65 const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res, 66 u32 vendor_type); 67 struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res, 68 u32 vendor_type); 69 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s, 70 const u8 *bssid); 71 void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec); 72 void scan_only_handler(struct wpa_supplicant *wpa_s, 73 struct wpa_scan_results *scan_res); 74 int wpas_scan_scheduled(struct wpa_supplicant *wpa_s); 75 struct wpa_driver_scan_params * 76 wpa_scan_clone_params(const struct wpa_driver_scan_params *src); 77 void wpa_scan_free_params(struct wpa_driver_scan_params *params); 78 int wpas_start_pno(struct wpa_supplicant *wpa_s); 79 int wpas_stop_pno(struct wpa_supplicant *wpa_s); 80 void wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s); 81 void wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s); 82 83 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s, 84 unsigned int type); 85 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s, 86 unsigned int type, const u8 *addr, 87 const u8 *mask); 88 int wpas_mac_addr_rand_scan_get_mask(struct wpa_supplicant *wpa_s, 89 unsigned int type, u8 *mask); 90 int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s); 91 void scan_snr(struct wpa_scan_res *res); 92 void scan_est_throughput(struct wpa_supplicant *wpa_s, 93 struct wpa_scan_res *res); 94 unsigned int wpas_get_est_tpt(const struct wpa_supplicant *wpa_s, 95 const u8 *ies, size_t ies_len, int rate, 96 int snr, int freq, enum chan_width *max_cw); 97 void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s); 98 int wpa_add_scan_freqs_list(struct wpa_supplicant *wpa_s, 99 enum hostapd_hw_mode band, 100 struct wpa_driver_scan_params *params, 101 bool is_6ghz, bool only_6ghz_psc, 102 bool exclude_radar); 103 int wpas_channel_width_rssi_bump(const u8 *ies, size_t ies_len, 104 enum chan_width cw); 105 int wpas_adjust_snr_by_chanwidth(const u8 *ies, size_t ies_len, 106 enum chan_width max_cw, int snr); 107 108 #endif /* SCAN_H */ 109