Add AVG_RSSI report in signal_poll

Add AVG_RSSI report to the signal_poll command if it is reported by
the kernel.

Signed-hostap: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-hostap: Ilan Peer <ilan.peer@intel.com>

src/drivers/driver.h

@@ -1108,6 +1108,7 @@ struct wpa_signal_info {
 	u32 frequency;
 	int above_threshold;
 	int current_signal;
+	int avg_signal;
 	int current_noise;
 	int current_txrate;
 	enum chan_width chanwidth;

src/drivers/driver_nl80211.c

@@ -1880,6 +1880,7 @@ static int get_link_signal(struct nl_msg *msg, void *arg)
 	struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
 	static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
 		[NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
+		[NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
 	};
 	struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
 	static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
@@ -1902,6 +1903,12 @@ static int get_link_signal(struct nl_msg *msg, void *arg)
 	sig_change->current_signal =
 		(s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
 
+	if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
+		sig_change->avg_signal =
+			(s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
+	else
+		sig_change->avg_signal = 0;
+
 	if (sinfo[NL80211_STA_INFO_TX_BITRATE]) {
 		if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
 				     sinfo[NL80211_STA_INFO_TX_BITRATE],

wpa_supplicant/ctrl_iface.c

@@ -5060,6 +5060,14 @@ static int wpa_supplicant_signal_poll(struct wpa_supplicant *wpa_s, char *buf,
 		pos += ret;
 	}
 
+	if (si.avg_signal) {
+		ret = os_snprintf(pos, end - pos,
+				  "AVG_RSSI=%d\n", si.avg_signal);
+		if (ret < 0 || ret >= end - pos)
+			return -1;
+		pos += ret;
+	}
+
 	return pos - buf;
 }