1fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt/* 2fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt * BSS Load Element / Channel Utilization 3fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt * Copyright (c) 2014, Qualcomm Atheros, Inc. 4fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt * 5fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt * This software may be distributed under the terms of the BSD license. 6fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt * See README for more details. 7fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt */ 8fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 9fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt#include "utils/includes.h" 10fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 11fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt#include "utils/common.h" 12fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt#include "utils/eloop.h" 13fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt#include "hostapd.h" 14fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt#include "bss_load.h" 15fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt#include "ap_drv_ops.h" 16fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt#include "beacon.h" 17fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 18fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 19fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidtstatic void update_channel_utilization(void *eloop_data, void *user_data) 20fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt{ 21fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt struct hostapd_data *hapd = eloop_data; 22fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt unsigned int sec, usec; 23fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt int err; 24fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 25fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt if (!(hapd->beacon_set_done && hapd->started)) 26fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt return; 27fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 28fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt err = hostapd_drv_get_survey(hapd, hapd->iface->freq); 29fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt if (err) { 30fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt wpa_printf(MSG_ERROR, "BSS Load: Failed to get survey data"); 31fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt return; 32fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt } 33fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 34fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt ieee802_11_set_beacon(hapd); 35fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 36fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt sec = ((hapd->bss_load_update_timeout / 1000) * 1024) / 1000; 37fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt usec = (hapd->bss_load_update_timeout % 1000) * 1024; 38fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt eloop_register_timeout(sec, usec, update_channel_utilization, hapd, 39fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt NULL); 40fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt} 41fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 42fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 43fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidtint bss_load_update_init(struct hostapd_data *hapd) 44fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt{ 45fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt struct hostapd_bss_config *conf = hapd->conf; 46fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt struct hostapd_config *iconf = hapd->iconf; 47fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt unsigned int sec, usec; 48fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 49fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt if (!conf->bss_load_update_period || !iconf->beacon_int) 50fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt return -1; 51fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 52fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt hapd->bss_load_update_timeout = conf->bss_load_update_period * 53fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt iconf->beacon_int; 54fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt sec = ((hapd->bss_load_update_timeout / 1000) * 1024) / 1000; 55fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt usec = (hapd->bss_load_update_timeout % 1000) * 1024; 56fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt eloop_register_timeout(sec, usec, update_channel_utilization, hapd, 57fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt NULL); 58fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt return 0; 59fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt} 60fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 61fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 62fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidtvoid bss_load_update_deinit(struct hostapd_data *hapd) 63fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt{ 64fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt eloop_cancel_timeout(update_channel_utilization, hapd, NULL); 65fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt} 66