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()
604 	for (i = 0; i < iface->current_mode->num_channels; i++) {  in acs_find_ideal_chan()
608 		chan = &iface->current_mode->channels[i];  in acs_find_ideal_chan()
613 		if (!is_in_chanlist(iface, chan))  in acs_find_ideal_chan()
618 		if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&  in acs_find_ideal_chan()
619 		    iface->conf->ieee80211n &&  in acs_find_ideal_chan()
620 		    iface->conf->secondary_channel &&  in acs_find_ideal_chan()
627 		if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&  in acs_find_ideal_chan()
628 		    iface->conf->ieee80211ac &&  in acs_find_ideal_chan()
629 		    iface->conf->vht_oper_chwidth == 1 &&  in acs_find_ideal_chan()
642 			adj_chan = acs_find_chan(iface, chan->freq + (j * 20));  in acs_find_ideal_chan()
660 		if (is_24ghz_mode(iface->current_mode->mode)) {  in acs_find_ideal_chan()
662 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
670 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
678 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
686 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
699 		if (iface->conf->acs_chan_bias) {  in acs_find_ideal_chan()
700 			for (k = 0; k < iface->conf->num_acs_chan_bias; k++) {  in acs_find_ideal_chan()
701 				bias = &iface->conf->acs_chan_bias[k];  in acs_find_ideal_chan()
706 		} else if (is_24ghz_mode(iface->current_mode->mode) &&  in acs_find_ideal_chan()
745 static void acs_adjust_vht_center_freq(struct hostapd_iface *iface)  in acs_adjust_vht_center_freq()  argument
751 	switch (iface->conf->vht_oper_chwidth) {  in acs_adjust_vht_center_freq()
753 		offset = 2 * iface->conf->secondary_channel;  in acs_adjust_vht_center_freq()
765 	iface->conf->vht_oper_centr_freq_seg0_idx =  in acs_adjust_vht_center_freq()
766 		iface->conf->channel + offset;  in acs_adjust_vht_center_freq()
770 static int acs_study_survey_based(struct hostapd_iface *iface)  in acs_study_survey_based()  argument
774 	if (!iface->chans_surveyed) {  in acs_study_survey_based()
779 	if (!acs_surveys_are_sufficient(iface)) {  in acs_study_survey_based()
784 	acs_survey_all_chans_intereference_factor(iface);  in acs_study_survey_based()
789 static int acs_study_options(struct hostapd_iface *iface)  in acs_study_options()  argument
793 	err = acs_study_survey_based(iface);  in acs_study_options()
804 static void acs_study(struct hostapd_iface *iface)  in acs_study()  argument
809 	err = acs_study_options(iface);  in acs_study()
815 	ideal_chan = acs_find_ideal_chan(iface);  in acs_study()
822 	iface->conf->channel = ideal_chan->chan;  in acs_study()
824 	if (iface->conf->ieee80211ac)  in acs_study()
825 		acs_adjust_vht_center_freq(iface);  in acs_study()
833 	if (hostapd_acs_completed(iface, err) == HOSTAPD_CHAN_VALID) {  in acs_study()
834 		acs_cleanup(iface);  in acs_study()
841 	acs_fail(iface);  in acs_study()
845 static void acs_scan_complete(struct hostapd_iface *iface)  in acs_scan_complete()  argument
849 	iface->scan_cb = NULL;  in acs_scan_complete()
852 		   iface->conf->acs_num_scans);  in acs_scan_complete()
854 	err = hostapd_drv_get_survey(iface->bss[0], 0);  in acs_scan_complete()
860 	if (++iface->acs_num_completed_scans < iface->conf->acs_num_scans) {  in acs_scan_complete()
861 		err = acs_request_scan(iface);  in acs_scan_complete()
870 	acs_study(iface);  in acs_scan_complete()
873 	hostapd_acs_completed(iface, 1);  in acs_scan_complete()
874 	acs_fail(iface);  in acs_scan_complete()
878 static int acs_request_scan(struct hostapd_iface *iface)  in acs_request_scan()  argument
885 	params.freqs = os_calloc(iface->current_mode->num_channels + 1,  in acs_request_scan()
891 	for (i = 0; i < iface->current_mode->num_channels; i++) {  in acs_request_scan()
892 		chan = &iface->current_mode->channels[i];  in acs_request_scan()
896 		if (!is_in_chanlist(iface, chan))  in acs_request_scan()
903 	iface->scan_cb = acs_scan_complete;  in acs_request_scan()
906 		   iface->acs_num_completed_scans + 1,  in acs_request_scan()
907 		   iface->conf->acs_num_scans);  in acs_request_scan()
909 	if (hostapd_driver_scan(iface->bss[0], &params) < 0) {  in acs_request_scan()
911 		acs_cleanup(iface);  in acs_request_scan()
921 enum hostapd_chan_status acs_init(struct hostapd_iface *iface)  in acs_init()  argument
927 	if (iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) {  in acs_init()
929 		err = hostapd_drv_do_acs(iface->bss[0]);  in acs_init()
935 	if (!iface->current_mode)  in acs_init()
938 	acs_cleanup(iface);  in acs_init()
940 	err = acs_request_scan(iface);  in acs_init()
944 	hostapd_set_state(iface, HAPD_IFACE_ACS);  in acs_init()
945 	wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_STARTED);  in acs_init()