244 static int acs_request_scan(struct hostapd_iface *iface);
263 static void acs_cleanup(struct hostapd_iface *iface)  in acs_cleanup()  argument
268 	for (i = 0; i < iface->current_mode->num_channels; i++) {  in acs_cleanup()
269 		chan = &iface->current_mode->channels[i];  in acs_cleanup()
279 	iface->chans_surveyed = 0;  in acs_cleanup()
280 	iface->acs_num_completed_scans = 0;  in acs_cleanup()
284 static void acs_fail(struct hostapd_iface *iface)  in acs_fail()  argument
287 	acs_cleanup(iface);  in acs_fail()
288 	hostapd_disable_iface(iface);  in acs_fail()
326 acs_survey_chan_interference_factor(struct hostapd_iface *iface,  in acs_survey_chan_interference_factor()  argument
353 							    iface->lowest_nf);  in acs_survey_chan_interference_factor()
445 static int acs_surveys_are_sufficient(struct hostapd_iface *iface)  in acs_surveys_are_sufficient()  argument
451 	for (i = 0; i < iface->current_mode->num_channels; i++) {  in acs_surveys_are_sufficient()
452 		chan = &iface->current_mode->channels[i];  in acs_surveys_are_sufficient()
479 static int is_in_chanlist(struct hostapd_iface *iface,  in is_in_chanlist()  argument
482 	if (!iface->conf->acs_ch_list.num)  in is_in_chanlist()
485 	return freq_range_list_includes(&iface->conf->acs_ch_list, chan->chan);  in is_in_chanlist()
490 	struct hostapd_iface *iface)  in acs_survey_all_chans_intereference_factor()  argument
495 	for (i = 0; i < iface->current_mode->num_channels; i++) {  in acs_survey_all_chans_intereference_factor()
496 		chan = &iface->current_mode->channels[i];  in acs_survey_all_chans_intereference_factor()
501 		if (!is_in_chanlist(iface, chan))  in acs_survey_all_chans_intereference_factor()
507 		acs_survey_chan_interference_factor(iface, chan);  in acs_survey_all_chans_intereference_factor()
515 static struct hostapd_channel_data *acs_find_chan(struct hostapd_iface *iface,  in acs_find_chan()  argument
521 	for (i = 0; i < iface->current_mode->num_channels; i++) {  in acs_find_chan()
522 		chan = &iface->current_mode->channels[i];  in acs_find_chan()
572 acs_find_ideal_chan(struct hostapd_iface *iface)  in acs_find_ideal_chan()  argument
583 	if (iface->conf->ieee80211n &&  in acs_find_ideal_chan()
584 	    iface->conf->secondary_channel == -1) {  in acs_find_ideal_chan()
589 	if (iface->conf->ieee80211n &&  in acs_find_ideal_chan()
590 	    iface->conf->secondary_channel)  in acs_find_ideal_chan()
593 	if (iface->conf->ieee80211ac &&  in acs_find_ideal_chan()
594 	    iface->conf->vht_oper_chwidth == 1)  in acs_find_ideal_chan()
605 	for (i = 0; i < iface->current_mode->num_channels; i++) {  in acs_find_ideal_chan()
609 		chan = &iface->current_mode->channels[i];  in acs_find_ideal_chan()
614 		if (!is_in_chanlist(iface, chan))  in acs_find_ideal_chan()
619 		if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&  in acs_find_ideal_chan()
620 		    iface->conf->ieee80211n &&  in acs_find_ideal_chan()
621 		    iface->conf->secondary_channel &&  in acs_find_ideal_chan()
628 		if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&  in acs_find_ideal_chan()
629 		    iface->conf->ieee80211ac &&  in acs_find_ideal_chan()
630 		    iface->conf->vht_oper_chwidth == 1 &&  in acs_find_ideal_chan()
643 			adj_chan = acs_find_chan(iface, chan->freq + (j * 20));  in acs_find_ideal_chan()
661 		if (is_24ghz_mode(iface->current_mode->mode)) {  in acs_find_ideal_chan()
663 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
671 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
679 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
687 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
700 		if (iface->conf->acs_chan_bias) {  in acs_find_ideal_chan()
701 			for (k = 0; k < iface->conf->num_acs_chan_bias; k++) {  in acs_find_ideal_chan()
702 				bias = &iface->conf->acs_chan_bias[k];  in acs_find_ideal_chan()
707 		} else if (is_24ghz_mode(iface->current_mode->mode) &&  in acs_find_ideal_chan()
746 static void acs_adjust_vht_center_freq(struct hostapd_iface *iface)  in acs_adjust_vht_center_freq()  argument
752 	switch (iface->conf->vht_oper_chwidth) {  in acs_adjust_vht_center_freq()
754 		offset = 2 * iface->conf->secondary_channel;  in acs_adjust_vht_center_freq()
766 	iface->conf->vht_oper_centr_freq_seg0_idx =  in acs_adjust_vht_center_freq()
767 		iface->conf->channel + offset;  in acs_adjust_vht_center_freq()
771 static int acs_study_survey_based(struct hostapd_iface *iface)  in acs_study_survey_based()  argument
775 	if (!iface->chans_surveyed) {  in acs_study_survey_based()
780 	if (!acs_surveys_are_sufficient(iface)) {  in acs_study_survey_based()
785 	acs_survey_all_chans_intereference_factor(iface);  in acs_study_survey_based()
790 static int acs_study_options(struct hostapd_iface *iface)  in acs_study_options()  argument
794 	err = acs_study_survey_based(iface);  in acs_study_options()
805 static void acs_study(struct hostapd_iface *iface)  in acs_study()  argument
810 	err = acs_study_options(iface);  in acs_study()
816 	ideal_chan = acs_find_ideal_chan(iface);  in acs_study()
823 	iface->conf->channel = ideal_chan->chan;  in acs_study()
825 	if (iface->conf->ieee80211ac)  in acs_study()
826 		acs_adjust_vht_center_freq(iface);  in acs_study()
834 	if (hostapd_acs_completed(iface, err) == HOSTAPD_CHAN_VALID) {  in acs_study()
835 		acs_cleanup(iface);  in acs_study()
842 	acs_fail(iface);  in acs_study()
846 static void acs_scan_complete(struct hostapd_iface *iface)  in acs_scan_complete()  argument
850 	iface->scan_cb = NULL;  in acs_scan_complete()
853 		   iface->conf->acs_num_scans);  in acs_scan_complete()
855 	err = hostapd_drv_get_survey(iface->bss[0], 0);  in acs_scan_complete()
861 	if (++iface->acs_num_completed_scans < iface->conf->acs_num_scans) {  in acs_scan_complete()
862 		err = acs_request_scan(iface);  in acs_scan_complete()
871 	acs_study(iface);  in acs_scan_complete()
874 	hostapd_acs_completed(iface, 1);  in acs_scan_complete()
875 	acs_fail(iface);  in acs_scan_complete()
879 static int acs_request_scan(struct hostapd_iface *iface)  in acs_request_scan()  argument
886 	params.freqs = os_calloc(iface->current_mode->num_channels + 1,  in acs_request_scan()
892 	for (i = 0; i < iface->current_mode->num_channels; i++) {  in acs_request_scan()
893 		chan = &iface->current_mode->channels[i];  in acs_request_scan()
897 		if (!is_in_chanlist(iface, chan))  in acs_request_scan()
904 	iface->scan_cb = acs_scan_complete;  in acs_request_scan()
907 		   iface->acs_num_completed_scans + 1,  in acs_request_scan()
908 		   iface->conf->acs_num_scans);  in acs_request_scan()
910 	if (hostapd_driver_scan(iface->bss[0], &params) < 0) {  in acs_request_scan()
912 		acs_cleanup(iface);  in acs_request_scan()
922 enum hostapd_chan_status acs_init(struct hostapd_iface *iface)  in acs_init()  argument
928 	if (iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) {  in acs_init()
930 		err = hostapd_drv_do_acs(iface->bss[0]);  in acs_init()
936 	acs_cleanup(iface);  in acs_init()
938 	err = acs_request_scan(iface);  in acs_init()
942 	hostapd_set_state(iface, HAPD_IFACE_ACS);  in acs_init()
943 	wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_STARTED);  in acs_init()