auto-roam initial implementation (111fa027) · Commits · e / os / android_frameworks_base

wifi/java/android/net/wifi/ScanResult.java

+15 −0

Original line number	Diff line number	Diff line
		@@ -89,6 +89,21 @@ public class ScanResult implements Parcelable {
		* {@hide}
		*/
		public final static int UNSPECIFIED = -1;
		/**
		* @hide
		* TODO: makes real freq boundaries
		*/
		public boolean is24GHz() {
		return frequency > 2400 && frequency < 2500;
		}

		/**
		* @hide
		* TODO: makes real freq boundaries
		*/
		public boolean is5GHz() {
		return frequency > 4900 && frequency < 5900;
		}

		/** information element from beacon
		* @hide

wifi/java/android/net/wifi/WifiConfiguration.java

+35 −4

Original line number	Diff line number	Diff line
		@@ -405,6 +405,10 @@ public class WifiConfiguration implements Parcelable {
		/ @hide /
		public static int INITIAL_AUTO_JOIN_ATTEMPT_MIN_5 = -70;

		/** @hide
		* 5GHz band is prefered over 2.4 if the 5GHz RSSI is higher than this threshold **/
		public static int A_BAND_PREFERENCE_RSSI_THRESHOLD = -65;

		/**
		* @hide
		* A summary of the RSSI and Band status for that configuration
		@@ -481,11 +485,11 @@ public class WifiConfiguration implements Parcelable {
		if (result.seen == 0)
		continue;

		if ((result.frequency > 4900) && (result.frequency < 5900)) {
		if (result.is5GHz()) {
		//strictly speaking: [4915, 5825]
		//number of known BSSID on 5GHz band
		status.num5 = status.num5 + 1;
		} else if ((result.frequency > 2400) && (result.frequency < 2500)) {
		} else if (result.is24GHz()) {
		//strictly speaking: [2412, 2482]
		//number of known BSSID on 2.4Ghz band
		status.num24 = status.num24 + 1;
		@@ -493,12 +497,12 @@ public class WifiConfiguration implements Parcelable {

		if ((now_ms - result.seen) > age) continue;

		if ((result.frequency > 4900) && (result.frequency < 5900)) {
		if (result.is5GHz()) {
		if (result.level > status.rssi5) {
		status.rssi5 = result.level;
		status.age5 = result.seen;
		}
		} else if ((result.frequency > 2400) && (result.frequency < 2500)) {
		} else if (result.is24GHz()) {
		if (result.level > status.rssi24) {
		status.rssi24 = result.level;
		status.age24 = result.seen;
		@@ -547,6 +551,17 @@ public class WifiConfiguration implements Parcelable {
		*/
		public long blackListTimestamp;

		/**
		* @hide
		* last time the system was connected to this configuration.
		*/
		public long lastConnected;

		/**
		* @hide
		* last time the system was disconnected to this configuration.
		*/
		public long lastDisconnected;

		/**
		* Set if the configuration was self added by the framework
		@@ -658,7 +673,20 @@ public class WifiConfiguration implements Parcelable {

		// TODO: Add more checks
		return true;
		}

		/**
		* Helper function, identify if a configuration is linked
		* @hide
		*/
		public boolean isLinked(WifiConfiguration config) {
		if (config.linkedConfigurations != null && linkedConfigurations != null) {
		if (config.linkedConfigurations.get(configKey()) != null
		&& linkedConfigurations.get(config.configKey()) != null) {
		return true;
		}
		}
		return false;
		}

		/**
		@@ -688,6 +716,7 @@ public class WifiConfiguration implements Parcelable {

		/ @hide /
		public void setAutoJoinStatus(int status) {
		if (status < 0) status = 0;
		if (status == 0) {
		blackListTimestamp = 0;
		} else if (status > autoJoinStatus) {
		@@ -1079,6 +1108,8 @@ public class WifiConfiguration implements Parcelable {
		creatorUid = source.creatorUid;
		peerWifiConfiguration = source.peerWifiConfiguration;
		blackListTimestamp = source.blackListTimestamp;
		lastConnected = source.lastConnected;
		lastDisconnected = source.lastDisconnected;
		}
		}

wifi/java/android/net/wifi/WifiInfo.java

+70 −6

Original line number	Diff line number	Diff line
		@@ -62,6 +62,17 @@ public class WifiInfo implements Parcelable {
		private String mBSSID;
		private WifiSsid mWifiSsid;
		private int mNetworkId;

		/ @hide /
		public static final int INVALID_RSSI = -127;

		/ @hide /
		public static final int MIN_RSSI = -126;

		/ @hide /
		public static final int MAX_RSSI = 200;


		/**
		* Received Signal Strength Indicator
		*/
		@@ -131,7 +142,8 @@ public class WifiInfo implements Parcelable {
		public int score;

		/**
		* @hide *
		* TODO: get actual timestamp and calculate true rates
		* @hide
		*/
		public void updatePacketRates(WifiLinkLayerStats stats) {
		if (stats != null) {
		@@ -156,13 +168,38 @@ public class WifiInfo implements Parcelable {
		rxSuccess = rxgood;
		txRetries = txretries;
		} else {
		txBadRate = 0;
		txBad = 0;
		txSuccess = 0;
		rxSuccess = 0;
		txRetries = 0;
		txBadRate = 0;
		txSuccessRate = 0;
		rxSuccessRate = 0;
		txRetriesRate = 0;
		}
		}


		/**
		* This function is less powerful and used if the WifiLinkLayerStats API is not implemented
		* at the Wifi HAL
		* @hide
		*/
		public void updatePacketRates(long txPackets, long rxPackets) {
		//paranoia
		txBad = 0;
		txRetries = 0;
		txBadRate = 0;
		txRetriesRate = 0;

		txSuccessRate = (txSuccessRate * 0.5)
		+ ((double) (txPackets - txSuccess) * 0.5);
		rxSuccessRate = (rxSuccessRate * 0.5)
		+ ((double) (rxPackets - rxSuccess) * 0.5);
		txSuccess = txPackets;
		rxSuccess = rxPackets;
		}

		/**
		* Flag indicating that AP has hinted that upstream connection is metered,
		* and sensitive to heavy data transfers.
		@@ -175,9 +212,32 @@ public class WifiInfo implements Parcelable {
		mBSSID = null;
		mNetworkId = -1;
		mSupplicantState = SupplicantState.UNINITIALIZED;
		mRssi = -9999;
		mRssi = INVALID_RSSI;
		mLinkSpeed = -1;
		mFrequency = -1;
		txBad = 0;
		txSuccess = 0;
		rxSuccess = 0;
		txRetries = 0;
		txBadRate = 0;
		txSuccessRate = 0;
		rxSuccessRate = 0;
		txRetriesRate = 0;
		lowRssiCount = 0;
		badRssiCount = 0;
		score = 0;
		}

		/** @hide */
		public void reset() {
		setInetAddress(null);
		setBSSID(null);
		setSSID(null);
		setNetworkId(-1);
		setRssi(INVALID_RSSI);
		setLinkSpeed(-1);
		setFrequency(-1);
		setMeteredHint(false);
		}

		/**
		@@ -256,7 +316,7 @@ public class WifiInfo implements Parcelable {
		/**
		* Returns the received signal strength indicator of the current 802.11
		* network, in dBm.
		* @return the RSSI, in the range -110 to 10
		* @return the RSSI, in the range -127 to 200
		*/
		public int getRssi() {
		return mRssi;
		@@ -264,6 +324,10 @@ public class WifiInfo implements Parcelable {

		/** @hide */
		public void setRssi(int rssi) {
		if (rssi < INVALID_RSSI)
		rssi = INVALID_RSSI;
		if (rssi > MAX_RSSI)
		rssi = MAX_RSSI;
		mRssi = rssi;
		}