C++ (Cpp) hostapd_driver_get_scan_results Examples

Example #1

File: hw_features.c Project: imw/hapd

static void ieee80211n_check_scan(struct hostapd_iface *iface)
{
	struct wpa_scan_results *scan_res;
	int oper40;
	int res;

	/* Check list of neighboring BSSes (from scan) to see whether 40 MHz is
	 * allowed per IEEE Std 802.11-2012, 10.15.3.2 */

	iface->scan_cb = NULL;

	scan_res = hostapd_driver_get_scan_results(iface->bss[0]);
	if (scan_res == NULL) {
		hostapd_setup_interface_complete(iface, 1);
		return;
	}

	if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A)
		oper40 = ieee80211n_check_40mhz_5g(iface, scan_res);
	else
		oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res);
	wpa_scan_results_free(scan_res);

	if (!oper40) {
		wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on "
			   "channel pri=%d sec=%d based on overlapping BSSes",
			   iface->conf->channel,
			   iface->conf->channel +
			   iface->conf->secondary_channel * 4);
		iface->conf->secondary_channel = 0;
	}

	res = ieee80211n_allowed_ht40_channel_pair(iface);
	hostapd_setup_interface_complete(iface, !res);
}

Example #2

File: hw_features.c Project: 2014-class/freerouter

static void ieee80211n_check_scan(struct hostapd_iface *iface)
{
	struct wpa_scan_results *scan_res;
	int oper40;

	/* Check list of neighboring BSSes (from scan) to see whether 40 MHz is
	 * allowed per IEEE 802.11n/D7.0, 11.14.3.2 */

	iface->scan_cb = NULL;

	scan_res = hostapd_driver_get_scan_results(iface->bss[0]);
	if (scan_res == NULL) {
		hostapd_setup_interface_complete(iface, 1);
		return;
	}

	if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A)
		oper40 = ieee80211n_check_40mhz_5g(iface, scan_res);
	else
		oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res);
	wpa_scan_results_free(scan_res);

	if (!oper40) {
		wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on "
			   "channel pri=%d sec=%d based on overlapping BSSes",
			   iface->conf->channel,
			   iface->conf->channel +
			   iface->conf->secondary_channel * 4);
		iface->conf->secondary_channel = 0;
		iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
	}

	hostapd_setup_interface_complete(iface, 0);
}

Example #3

File: hw_features.c Project: FreeBSDFoundation/freebsd

static void ieee80211n_check_scan(struct hostapd_iface *iface)
{
	struct wpa_scan_results *scan_res;
	int oper40;
	int res;

	/* Check list of neighboring BSSes (from scan) to see whether 40 MHz is
	 * allowed per IEEE Std 802.11-2012, 10.15.3.2 */

	iface->scan_cb = NULL;

	scan_res = hostapd_driver_get_scan_results(iface->bss[0]);
	if (scan_res == NULL) {
		hostapd_setup_interface_complete(iface, 1);
		return;
	}

	if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A)
		oper40 = ieee80211n_check_40mhz_5g(iface, scan_res);
	else
		oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res);
	wpa_scan_results_free(scan_res);

	iface->secondary_ch = iface->conf->secondary_channel;
	if (!oper40) {
		wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on "
			   "channel pri=%d sec=%d based on overlapping BSSes",
			   iface->conf->channel,
			   iface->conf->channel +
			   iface->conf->secondary_channel * 4);
		iface->conf->secondary_channel = 0;
		if (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX) {
			/*
			 * TODO: Could consider scheduling another scan to check
			 * if channel width can be changed if no coex reports
			 * are received from associating stations.
			 */
		}
	}

	res = ieee80211n_allowed_ht40_channel_pair(iface);
	if (!res) {
		iface->conf->secondary_channel = 0;
		iface->conf->vht_oper_centr_freq_seg0_idx = 0;
		iface->conf->vht_oper_centr_freq_seg1_idx = 0;
		iface->conf->vht_oper_chwidth = VHT_CHANWIDTH_USE_HT;
		res = 1;
		wpa_printf(MSG_INFO, "Fallback to 20 MHz");
	}

	hostapd_setup_interface_complete(iface, !res);
}