src/ap/acs.c

249 static void acs_clean_chan_surveys(struct hostapd_channel_data *chan)
253 	if (dl_list_empty(&chan->survey_list))
256 	dl_list_for_each_safe(survey, tmp, &chan->survey_list,
267 	struct hostapd_channel_data *chan;
270 		chan = &iface->current_mode->channels[i];
272 		if (chan->flag & HOSTAPD_CHAN_SURVEY_LIST_INITIALIZED)
273 			acs_clean_chan_surveys(chan);
275 		dl_list_init(&chan->survey_list);
276 		chan->flag |= HOSTAPD_CHAN_SURVEY_LIST_INITIALIZED;
277 		chan->min_nf = 0;
328 				    struct hostapd_channel_data *chan)
335 	if (dl_list_empty(&chan->survey_list) ||
336 	    (chan->flag & HOSTAPD_CHAN_DISABLED))
339 	chan->interference_factor = 0;
341 	dl_list_for_each(survey, &chan->survey_list, struct freq_survey, list)
353 		chan->interference_factor += int_factor;
355 			   i, chan->min_nf, int_factor,
362 		chan->interference_factor /= count;
366 static int acs_usable_ht40_chan(const struct hostapd_channel_data *chan)
373 		if (chan->chan == allowed[i])
380 static int acs_usable_vht80_chan(const struct hostapd_channel_data *chan)
386 		if (chan->chan == allowed[i])
393 static int acs_usable_vht160_chan(const struct hostapd_channel_data *chan)
399 		if (chan->chan == allowed[i])
429 static int acs_survey_list_is_sufficient(struct hostapd_channel_data *chan)
434 	dl_list_for_each(survey, &chan->survey_list, struct freq_survey, list)
449 			   chan->chan);
459 	struct hostapd_channel_data *chan;
463 		chan = &iface->current_mode->channels[i];
464 		if (!(chan->flag & HOSTAPD_CHAN_DISABLED) &&
465 		    acs_survey_list_is_sufficient(chan))
474 static int acs_usable_chan(struct hostapd_channel_data *chan)
476 	return !dl_list_empty(&chan->survey_list) &&
477 		!(chan->flag & HOSTAPD_CHAN_DISABLED) &&
478 		acs_survey_list_is_sufficient(chan);
483 			  struct hostapd_channel_data *chan)
488 	return freq_range_list_includes(&iface->conf->acs_ch_list, chan->chan);
496 	struct hostapd_channel_data *chan;
499 		chan = &iface->current_mode->channels[i];
501 		if (!acs_usable_chan(chan))
504 		if (!is_in_chanlist(iface, chan))
508 			   chan->chan, chan->freq);
510 		acs_survey_chan_interference_factor(iface, chan);
513 			   chan->interference_factor);
521 	struct hostapd_channel_data *chan;
525 		chan = &iface->current_mode->channels[i];
527 		if (chan->flag & HOSTAPD_CHAN_DISABLED)
530 		if (chan->freq == freq)
531 			return chan;
545 static int is_common_24ghz_chan(int chan)
547 	return chan == 1 || chan == 6 || chan == 11;
569  * At this point it's assumed chan->interface_factor has been computed.
571  * option (survey, BSS, spectral, ...). chan->interference factor must be
577 	struct hostapd_channel_data *chan, *adj_chan, *ideal_chan = NULL,
619 		chan = &iface->current_mode->channels[i];
625 		if (!chan_pri_allowed(chan))
628 		if (!is_in_chanlist(iface, chan))
631 		if (!chan_bw_allowed(chan, bw, 1, 1)) {
634 				   chan->chan, bw);
643 		    !acs_usable_ht40_chan(chan)) {
645 				   chan->chan);
653 			    !acs_usable_vht80_chan(chan)) {
656 					   chan->chan);
662 			    !acs_usable_vht160_chan(chan)) {
665 					   chan->chan);
671 		if (acs_usable_chan(chan))
672 			factor = chan->interference_factor;
676 			adj_chan = acs_find_chan(iface, chan->freq + (j * 20));
683 					   chan->chan, adj_chan->chan, bw);
695 				   chan->chan);
703 				adj_chan = acs_find_chan(iface, chan->freq +
711 				adj_chan = acs_find_chan(iface, chan->freq +
719 				adj_chan = acs_find_chan(iface, chan->freq +
727 				adj_chan = acs_find_chan(iface, chan->freq +
743 				if (bias->channel == chan->chan)
748 			   is_common_24ghz_chan(chan->chan)) {
749 			tmp_bias.channel = chan->chan;
758 				   chan->chan, factor, bias->bias);
762 				   chan->chan, factor);
765 		if (acs_usable_chan(chan) &&
768 			ideal_chan = chan;
773 			rand_chan = chan;
778 			   ideal_chan->chan, ideal_chan->freq, ideal_factor);
864 	iface->conf->channel = ideal_chan->chan;
923 	struct hostapd_channel_data *chan;
934 		chan = &iface->current_mode->channels[i];
935 		if (chan->flag & HOSTAPD_CHAN_DISABLED)
938 		if (!is_in_chanlist(iface, chan))
941 		*freq++ = chan->freq;