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 #define IS_2P4GHZ(n) (n >= 2412 && n <= 2484) 34 #define IS_5GHZ(n) (n > 4000 && n < 5895) 35 36 int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s); 37 void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec); 38 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s, 39 int sec, int usec); 40 int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s); 41 void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s); 42 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s); 43 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s); 44 void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s, 45 int scanning); 46 struct wpa_driver_scan_params; 47 int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s, 48 struct wpa_driver_scan_params *params); 49 struct wpa_scan_results * 50 wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s, 51 struct scan_info *info, int new_scan); 52 int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s); 53 const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie); 54 const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res, 55 u32 vendor_type); 56 const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res, 57 u32 vendor_type); 58 struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res, 59 u32 vendor_type); 60 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s, 61 const u8 *bssid); 62 void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec); 63 void scan_only_handler(struct wpa_supplicant *wpa_s, 64 struct wpa_scan_results *scan_res); 65 int wpas_scan_scheduled(struct wpa_supplicant *wpa_s); 66 struct wpa_driver_scan_params * 67 wpa_scan_clone_params(const struct wpa_driver_scan_params *src); 68 void wpa_scan_free_params(struct wpa_driver_scan_params *params); 69 int wpas_start_pno(struct wpa_supplicant *wpa_s); 70 int wpas_stop_pno(struct wpa_supplicant *wpa_s); 71 void wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s); 72 void wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s); 73 74 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s, 75 unsigned int type); 76 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s, 77 unsigned int type, const u8 *addr, 78 const u8 *mask); 79 int wpas_mac_addr_rand_scan_get_mask(struct wpa_supplicant *wpa_s, 80 unsigned int type, u8 *mask); 81 int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s); 82 void filter_scan_res(struct wpa_supplicant *wpa_s, 83 struct wpa_scan_results *res); 84 void scan_snr(struct wpa_scan_res *res); 85 void scan_est_throughput(struct wpa_supplicant *wpa_s, 86 struct wpa_scan_res *res); 87 unsigned int wpas_get_est_tpt(const struct wpa_supplicant *wpa_s, 88 const u8 *ies, size_t ies_len, int rate, 89 int snr, int freq); 90 void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s); 91 int wpa_add_scan_freqs_list(struct wpa_supplicant *wpa_s, 92 enum hostapd_hw_mode band, 93 struct wpa_driver_scan_params *params, 94 bool is_6ghz); 95 96 #endif /* SCAN_H */ 97