Add signal strength average to StationInfo struct

And precise that Signal is the signal strength of the last received PPDU.

client_linux.go

@@ -443,6 +443,8 @@ func (info *StationInfo) parseAttributes(attrs []netlink.Attribute) error {
 			//  * @NL80211_STA_INFO_SIGNAL: signal strength of last received PPDU (u8, dBm)
 			// Should just be cast to int8, see code here: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/iw.git/tree/station.c#n378
 			info.Signal = int(int8(a.Data[0]))
+		case unix.NL80211_STA_INFO_SIGNAL_AVG:
+			info.SignalAverage = int(int8(a.Data[0]))
 		case unix.NL80211_STA_INFO_RX_PACKETS:
 			info.ReceivedPackets = int(nlenc.Uint32(a.Data))
 		case unix.NL80211_STA_INFO_TX_PACKETS:

client_linux_test.go

@@ -276,6 +276,7 @@ func TestLinux_clientStationInfoOK(t *testing.T) {
 			ReceivedPackets:    10,
 			TransmittedPackets: 20,
 			Signal:             -50,
+			SignalAverage:      -53,
 			TransmitRetries:    5,
 			TransmitFailed:     2,
 			BeaconLoss:         3,
@@ -291,6 +292,7 @@ func TestLinux_clientStationInfoOK(t *testing.T) {
 			ReceivedPackets:    20,
 			TransmittedPackets: 40,
 			Signal:             -25,
+			SignalAverage:      -27,
 			TransmitRetries:    10,
 			TransmitFailed:     4,
 			BeaconLoss:         6,
@@ -493,6 +495,7 @@ func (s *StationInfo) attributes() []netlink.Attribute {
 				{Type: unix.NL80211_STA_INFO_TX_BYTES, Data: nlenc.Uint32Bytes(uint32(s.TransmittedBytes))},
 				{Type: unix.NL80211_STA_INFO_TX_BYTES64, Data: nlenc.Uint64Bytes(uint64(s.TransmittedBytes))},
 				{Type: unix.NL80211_STA_INFO_SIGNAL, Data: []byte{byte(int8(s.Signal))}},
+				{Type: unix.NL80211_STA_INFO_SIGNAL_AVG, Data: []byte{byte(int8(s.SignalAverage))}},
 				{Type: unix.NL80211_STA_INFO_RX_PACKETS, Data: nlenc.Uint32Bytes(uint32(s.ReceivedPackets))},
 				{Type: unix.NL80211_STA_INFO_TX_PACKETS, Data: nlenc.Uint32Bytes(uint32(s.TransmittedPackets))},
 				{Type: unix.NL80211_STA_INFO_TX_RETRIES, Data: nlenc.Uint32Bytes(uint32(s.TransmitRetries))},

wifi.go

@@ -153,9 +153,12 @@ type StationInfo struct {
 	// The current data transmit bitrate, in bits/second.
 	TransmitBitrate int
 
-	// The signal strength of this station's connection, in dBm.
+	// The signal strength of the last received PPDU, in dBm.
 	Signal int
 
+	// The average signal strength, in dBm.
+	SignalAverage int
+
 	// The number of times the station has had to retry while sending a packet.
 	TransmitRetries int