hostapd: Added signal level to STA tracking

Add signal level information to the station tracking information. Also
make it available via the "TRACK_STA_LIST" control command.

Signed-off-by: Kevin Mahoney <k.mahoney@cablelabs.com>

hostapd/ctrl_iface.c

@@ -2083,8 +2083,9 @@ static int hostapd_ctrl_iface_track_sta_list(struct hostapd_data *hapd,
 		int ret;
 
 		os_reltime_sub(&now, &info->last_seen, &age);
-		ret = os_snprintf(pos, end - pos, MACSTR " %u\n",
-				  MAC2STR(info->addr), (unsigned int) age.sec);
+		ret = os_snprintf(pos, end - pos, MACSTR " %u %d\n",
+				  MAC2STR(info->addr), (unsigned int) age.sec,
+				  info->ssi_signal);
 		if (os_snprintf_error(end - pos, ret))
 			break;
 		pos += ret;

src/ap/beacon.c

@@ -623,7 +623,7 @@ static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
 }
 
 
-void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
+void sta_track_add(struct hostapd_iface *iface, const u8 *addr, int ssi_signal)
 {
 	struct hostapd_sta_info *info;
 
@@ -633,6 +633,7 @@ void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 		dl_list_del(&info->list);
 		dl_list_add_tail(&iface->sta_seen, &info->list);
 		os_get_reltime(&info->last_seen);
+		info->ssi_signal = ssi_signal;
 		return;
 	}
 
@@ -642,6 +643,7 @@ void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
 		return;
 	os_memcpy(info->addr, addr, ETH_ALEN);
 	os_get_reltime(&info->last_seen);
+	info->ssi_signal = ssi_signal;
 
 	if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
 		/* Expire oldest entry to make room for a new one */
@@ -717,7 +719,7 @@ void handle_probe_req(struct hostapd_data *hapd,
 		return;
 	ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN;
 	if (hapd->iconf->track_sta_max_num)
-		sta_track_add(hapd->iface, mgmt->sa);
+		sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
 	ie_len = len - IEEE80211_HDRLEN;
 
 	for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)

src/ap/beacon.h

@@ -21,7 +21,7 @@ int ieee802_11_update_beacons(struct hostapd_iface *iface);
 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 			       struct wpa_driver_ap_params *params);
 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params);
-void sta_track_add(struct hostapd_iface *iface, const u8 *addr);
+void sta_track_add(struct hostapd_iface *iface, const u8 *addr, int ssi_signal);
 void sta_track_del(struct hostapd_sta_info *info);
 void sta_track_expire(struct hostapd_iface *iface, int force);
 struct hostapd_data *

src/ap/hostapd.h

@@ -311,6 +311,7 @@ struct hostapd_sta_info {
 	struct dl_list list;
 	u8 addr[ETH_ALEN];
 	struct os_reltime last_seen;
+	int ssi_signal;
 #ifdef CONFIG_TAXONOMY
 	struct wpabuf *probe_ie_taxonomy;
 #endif /* CONFIG_TAXONOMY */

src/ap/ieee802_11.c

@@ -3029,7 +3029,7 @@ int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
 	}
 
 	if (hapd->iconf->track_sta_max_num)
-		sta_track_add(hapd->iface, mgmt->sa);
+		sta_track_add(hapd->iface, mgmt->sa, fi->ssi_signal);
 
 	switch (stype) {
 	case WLAN_FC_STYPE_AUTH: