[PATCH 08/19] hostapd: Add own neighbor report data to neighbor report db

[Ilan Peer]

From: David Spinadel <david.spinadel at intel.com>

Add own neighbor report data to neighbor report DB based on
local LCI and location civic data.

Signed-off-by: David Spinadel <david.spinadel at intel.com>
---
 src/ap/hostapd.c | 114 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)

diff --git a/src/ap/hostapd.c b/src/ap/hostapd.c
index 1ad7510..7e30fa9 100644
--- a/src/ap/hostapd.c
+++ b/src/ap/hostapd.c
@@ -1528,6 +1528,117 @@ void fst_hostapd_fill_iface_obj(struct hostapd_data *hapd,
 #endif /* CONFIG_FST */
 
 
+static enum nr_chan_width hostapd_get_nr_chan_width(struct hostapd_data *hapd,
+						    int ht, int vht)
+{
+	if (!ht && !vht)
+		return NR_CHAN_WIDTH_20;
+	if (!hapd->iconf->secondary_channel)
+		return NR_CHAN_WIDTH_20;
+	if (!vht || hapd->iconf->vht_oper_chwidth == VHT_CHANWIDTH_USE_HT)
+		return NR_CHAN_WIDTH_40;
+	if (hapd->iconf->vht_oper_chwidth == VHT_CHANWIDTH_80MHZ)
+		return NR_CHAN_WIDTH_80;
+	if (hapd->iconf->vht_oper_chwidth == VHT_CHANWIDTH_160MHZ)
+		return NR_CHAN_WIDTH_160;
+	if (hapd->iconf->vht_oper_chwidth == VHT_CHANWIDTH_80P80MHZ)
+		return NR_CHAN_WIDTH_80P80;
+	return NR_CHAN_WIDTH_20;
+}
+
+
+static void hostapd_set_own_neighbor_report(struct hostapd_data *hapd)
+{
+	u16 capab = hostapd_own_capab_info(hapd);
+	int ht = hapd->iconf->ieee80211n && !hapd->conf->disable_11n;
+	int vht = hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac;
+	struct wpa_ssid_value ssid;
+	u8 channel, op_class;
+	int center_freq1 = 0, center_freq2 = 0;
+	enum nr_chan_width width;
+	u32 bssid_info;
+	struct wpabuf *nr;
+
+	if (!(hapd->conf->radio_measurements[0] &
+	      WLAN_RRM_CAPS_NEIGHBOR_REPORT))
+		return;
+
+	bssid_info = 3; /* AP is reachable */
+	bssid_info |= NEI_REP_BSSID_INFO_SECURITY; /* "same as the AP" */
+	bssid_info |= NEI_REP_BSSID_INFO_KEY_SCOPE; /* "same as the AP" */
+
+	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT)
+		bssid_info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
+
+	bssid_info |= NEI_REP_BSSID_INFO_RM; /* RRM is supported */
+
+	if (hapd->conf->wmm_enabled) {
+		bssid_info |= NEI_REP_BSSID_INFO_QOS;
+
+		if (hapd->conf->wmm_uapsd &&
+		    hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_UAPSD)
+			bssid_info |= NEI_REP_BSSID_INFO_APSD;
+	}
+
+	if (ht) {
+		bssid_info |= (NEI_REP_BSSID_INFO_HT |
+			       NEI_REP_BSSID_INFO_DELAYED_BA);
+
+		/* VHT bit added in IEEE 802.11 MC D4.3 */
+		if (vht)
+			bssid_info |= NEI_REP_BSSID_INFO_VHT;
+	}
+
+	/* TODO: set NEI_REP_BSSID_INFO_MOBILITY_DOMAIN if MDE is set */
+
+	ieee80211_freq_to_channel_ext(hapd->iface->freq,
+				      hapd->iconf->secondary_channel,
+				      hapd->iconf->vht_oper_chwidth,
+				      &op_class, &channel);
+	width = hostapd_get_nr_chan_width(hapd, ht, vht);
+	if (vht) {
+		center_freq1 = ieee80211_chan_to_freq(NULL, op_class,
+				hapd->iconf->vht_oper_centr_freq_seg0_idx);
+		if (width == NR_CHAN_WIDTH_80P80)
+			center_freq2 = ieee80211_chan_to_freq(NULL, op_class,
+				hapd->iconf->vht_oper_centr_freq_seg1_idx);
+	} else if (ht) {
+		center_freq1 = hapd->iface->freq +
+					10 * hapd->iconf->secondary_channel;
+	}
+
+	ssid.ssid_len = hapd->conf->ssid.ssid_len;
+	os_memcpy(ssid.ssid, hapd->conf->ssid.ssid, ssid.ssid_len);
+
+	/* Neighbor report IE size = BSSID + BSSID info + op_class + chan +
+	 * phy type + wide bandwidth channel subelement
+	 */
+	nr = wpabuf_alloc(ETH_ALEN + 4 + 1 + 1 + 1 + 5);
+	if (!nr)
+		return;
+
+	wpabuf_put_data(nr, hapd->own_addr, ETH_ALEN);
+	wpabuf_put_le32(nr, bssid_info);
+	wpabuf_put_u8(nr, op_class);
+	wpabuf_put_u8(nr, channel);
+	wpabuf_put_u8(nr, ieee80211_get_phy_type(hapd->iface->freq, ht, vht));
+
+	/* Channel width subelement may be needed to allow the receiving STA
+	 * to send packets to the AP. It's an addition to IEEE802.11 MC D4.3
+	 */
+	wpabuf_put_u8(nr, NEIGHBOR_REPORT_BANDWIDTH);
+	wpabuf_put_u8(nr, 3);
+	wpabuf_put_u8(nr, width);
+	wpabuf_put_u8(nr, center_freq1);
+	wpabuf_put_u8(nr, center_freq2);
+
+	hostapd_neighbor_set(hapd, hapd->own_addr, &ssid, nr, hapd->iconf->lci,
+			     hapd->iconf->civic);
+
+	wpabuf_free(nr);
+}
+
+
 static int hostapd_setup_interface_complete_sync(struct hostapd_iface *iface,
 						 int err)
 {
@@ -1713,6 +1824,9 @@ dfs_offload:
 	if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
 		iface->interfaces->terminate_on_error--;
 
+	for (j = 0; j < iface->num_bss; j++)
+		hostapd_set_own_neighbor_report(iface->bss[j]);
+
 	return 0;
 
 fail:
-- 
1.9.1