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 #ifdef CONFIG_NW_SEL_RELIABILITY 22 /* 23 * This basically disables capping the SNR when choosing the best BSS. This 24 * means that the BSS with the highest SNR will be chosen, independent of the 25 * band. This is useful for scenarios where reliability is more important than 26 * throughput. 27 */ 28 #define GREAT_SNR 999 29 #else 30 /* 31 * Channels with a great SNR can operate at full rate. What is a great SNR? 32 * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general 33 * rule of thumb is that any SNR above 20 is good." This one 34 * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23 35 * recommends 25 as a minimum SNR for 54 Mbps data rate. The estimates used in 36 * scan_est_throughput() allow even smaller SNR values for the maximum rates 37 * (21 for 54 Mbps, 22 for VHT80 MCS9, 24 for HT40 and HT20 MCS7). Use 25 as a 38 * somewhat conservative value here. 39 */ 40 #define GREAT_SNR 25 41 #endif /* CONFIG_NW_SEL_RELIABILITY */ 42 43 #define IS_2P4GHZ(n) (n >= 2412 && n <= 2484) 44 #define IS_5GHZ(n) (n > 4000 && n < 5895) 45 46 int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s); 47 void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec); 48 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s, 49 int sec, int usec); 50 int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s); 51 void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s); 52 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s); 53 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s); 54 void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s, 55 int scanning); 56 struct wpa_driver_scan_params; 57 int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s, 58 struct wpa_driver_scan_params *params); 59 struct wpa_scan_results * 60 wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s, 61 struct scan_info *info, int new_scan); 62 int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s); 63 const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie); 64 const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res, 65 u32 vendor_type); 66 const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res, 67 u32 vendor_type); 68 struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res, 69 u32 vendor_type); 70 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s, 71 const u8 *bssid); 72 void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec); 73 void scan_only_handler(struct wpa_supplicant *wpa_s, 74 struct wpa_scan_results *scan_res); 75 int wpas_scan_scheduled(struct wpa_supplicant *wpa_s); 76 struct wpa_driver_scan_params * 77 wpa_scan_clone_params(const struct wpa_driver_scan_params *src); 78 void wpa_scan_free_params(struct wpa_driver_scan_params *params); 79 int wpas_start_pno(struct wpa_supplicant *wpa_s); 80 int wpas_stop_pno(struct wpa_supplicant *wpa_s); 81 void wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s); 82 void wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s); 83 84 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s, 85 unsigned int type); 86 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s, 87 unsigned int type, const u8 *addr, 88 const u8 *mask); 89 int wpas_mac_addr_rand_scan_get_mask(struct wpa_supplicant *wpa_s, 90 unsigned int type, u8 *mask); 91 int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s); 92 void filter_scan_res(struct wpa_supplicant *wpa_s, 93 struct wpa_scan_results *res); 94 void scan_snr(struct wpa_scan_res *res); 95 void scan_est_throughput(struct wpa_supplicant *wpa_s, 96 struct wpa_scan_res *res); 97 unsigned int wpas_get_est_tpt(const struct wpa_supplicant *wpa_s, 98 const u8 *ies, size_t ies_len, int rate, 99 int snr, int freq); 100 void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s); 101 int wpa_add_scan_freqs_list(struct wpa_supplicant *wpa_s, 102 enum hostapd_hw_mode band, 103 struct wpa_driver_scan_params *params, 104 bool is_6ghz); 105 106 #endif /* SCAN_H */ 107
