af832aa998
This allows external programs to get the average channel utilization. The average channel utilization is calculated and reported through STATUS command. Users need to configure chan_util_avg_period and bss_load_update_period in hostapd config to get the average channel utilization. Signed-off-by: Bhagavathi Perumal S <bperumal@qti.qualcomm.com>
99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/*
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* BSS Load Element / Channel Utilization
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* Copyright (c) 2014, Qualcomm Atheros, Inc.
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "utils/includes.h"
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#include "utils/common.h"
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#include "utils/eloop.h"
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#include "hostapd.h"
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#include "bss_load.h"
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#include "ap_drv_ops.h"
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#include "beacon.h"
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static int get_bss_load_update_timeout(struct hostapd_data *hapd,
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unsigned int *sec, unsigned int *usec)
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{
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unsigned int update_period = hapd->conf->bss_load_update_period;
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unsigned int beacon_int = hapd->iconf->beacon_int;
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unsigned int update_timeout;
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if (!update_period || !beacon_int) {
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wpa_printf(MSG_ERROR,
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"BSS Load: Invalid BSS load update configuration (period=%u beacon_int=%u)",
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update_period, beacon_int);
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return -1;
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}
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update_timeout = update_period * beacon_int;
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*sec = ((update_timeout / 1000) * 1024) / 1000;
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*usec = (update_timeout % 1000) * 1024;
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return 0;
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}
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static void update_channel_utilization(void *eloop_data, void *user_data)
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{
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struct hostapd_data *hapd = eloop_data;
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unsigned int sec, usec;
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int err;
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struct hostapd_iface *iface = hapd->iface;
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if (!(hapd->beacon_set_done && hapd->started))
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return;
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err = hostapd_drv_get_survey(hapd, hapd->iface->freq);
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if (err) {
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wpa_printf(MSG_ERROR, "BSS Load: Failed to get survey data");
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return;
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}
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ieee802_11_set_beacon(hapd);
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if (get_bss_load_update_timeout(hapd, &sec, &usec) < 0)
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return;
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if (hapd->conf->chan_util_avg_period) {
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iface->chan_util_samples_sum += iface->channel_utilization;
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iface->chan_util_num_sample_periods +=
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hapd->conf->bss_load_update_period;
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if (iface->chan_util_num_sample_periods >=
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hapd->conf->chan_util_avg_period) {
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iface->chan_util_average =
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iface->chan_util_samples_sum /
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(iface->chan_util_num_sample_periods /
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hapd->conf->bss_load_update_period);
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iface->chan_util_samples_sum = 0;
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iface->chan_util_num_sample_periods = 0;
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}
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}
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eloop_register_timeout(sec, usec, update_channel_utilization, hapd,
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NULL);
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}
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int bss_load_update_init(struct hostapd_data *hapd)
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{
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unsigned int sec, usec;
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if (get_bss_load_update_timeout(hapd, &sec, &usec) < 0)
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return -1;
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eloop_register_timeout(sec, usec, update_channel_utilization, hapd,
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NULL);
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return 0;
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}
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void bss_load_update_deinit(struct hostapd_data *hapd)
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{
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eloop_cancel_timeout(update_channel_utilization, hapd, NULL);
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}
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