1 /* 2 * BSS Load Element / Channel Utilization 3 * Copyright (c) 2014, Qualcomm Atheros, Inc. 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "utils/eloop.h" 13 #include "hostapd.h" 14 #include "bss_load.h" 15 #include "ap_drv_ops.h" 16 #include "beacon.h" 17 18 19 static void update_channel_utilization(void *eloop_data, void *user_data) 20 { 21 struct hostapd_data *hapd = eloop_data; 22 unsigned int sec, usec; 23 int err; 24 25 if (!(hapd->beacon_set_done && hapd->started)) 26 return; 27 28 err = hostapd_drv_get_survey(hapd, hapd->iface->freq); 29 if (err) { 30 wpa_printf(MSG_ERROR, "BSS Load: Failed to get survey data"); 31 return; 32 } 33 34 ieee802_11_set_beacon(hapd); 35 36 sec = ((hapd->bss_load_update_timeout / 1000) * 1024) / 1000; 37 usec = (hapd->bss_load_update_timeout % 1000) * 1024; 38 eloop_register_timeout(sec, usec, update_channel_utilization, hapd, 39 NULL); 40 } 41 42 43 int bss_load_update_init(struct hostapd_data *hapd) 44 { 45 struct hostapd_bss_config *conf = hapd->conf; 46 struct hostapd_config *iconf = hapd->iconf; 47 unsigned int sec, usec; 48 49 if (!conf->bss_load_update_period || !iconf->beacon_int) 50 return -1; 51 52 hapd->bss_load_update_timeout = conf->bss_load_update_period * 53 iconf->beacon_int; 54 sec = ((hapd->bss_load_update_timeout / 1000) * 1024) / 1000; 55 usec = (hapd->bss_load_update_timeout % 1000) * 1024; 56 eloop_register_timeout(sec, usec, update_channel_utilization, hapd, 57 NULL); 58 return 0; 59 } 60 61 62 void bss_load_update_deinit(struct hostapd_data *hapd) 63 { 64 eloop_cancel_timeout(update_channel_utilization, hapd, NULL); 65 } 66
