| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 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 */ |