static int acs_survey_list_is_sufficient(struct hostapd_channel_data *chan)
{
struct freq_survey *survey;
int ret = -1;
dl_list_for_each(survey, &chan->survey_list, struct freq_survey, list)
{
if (acs_survey_is_sufficient(survey)) {
ret = 1;
break;
}
ret = 0;
}
if (ret == -1)
ret = 1; /* no survey list entries */
if (!ret) {
wpa_printf(MSG_INFO,
"ACS: Channel %d has insufficient survey data",
chan->chan);
}
return ret;
}
static int acs_survey_list_is_sufficient(struct hostapd_channel_data *chan)
{
struct freq_survey *survey;
dl_list_for_each(survey, &chan->survey_list, struct freq_survey, list)
{
if (!acs_survey_is_sufficient(survey)) {
wpa_printf(MSG_ERROR, "ACS: Channel %d has insufficient survey data",
chan->chan);
return 0;
}
}
return 1;
}
static void
acs_survey_chan_interference_factor(struct hostapd_iface *iface,
struct hostapd_channel_data *chan)
{
struct freq_survey *survey;
unsigned int i = 0;
long double int_factor = 0;
unsigned count = 0;
if (dl_list_empty(&chan->survey_list))
return;
if (chan->flag & HOSTAPD_CHAN_DISABLED)
return;
chan->interference_factor = 0;
dl_list_for_each(survey, &chan->survey_list, struct freq_survey, list)
{
i++;
if (!acs_survey_is_sufficient(survey)) {
wpa_printf(MSG_DEBUG, "ACS: %d: insufficient data", i);
continue;
}
count++;
int_factor = acs_survey_interference_factor(survey,
iface->lowest_nf);
chan->interference_factor += int_factor;
wpa_printf(MSG_DEBUG, "ACS: %d: min_nf=%d interference_factor=%Lg nf=%d time=%lu busy=%lu rx=%lu",
i, chan->min_nf, int_factor,
survey->nf, (unsigned long) survey->channel_time,
(unsigned long) survey->channel_time_busy,
(unsigned long) survey->channel_time_rx);
}
if (!count)
return;
chan->interference_factor /= count;
}
