07573b3249
When Wi-fi connects at L2 layer, the beacons reach and the device can maintain a connection to the access point, but the application connectivity can be flaky (due to bigger packet size exchange). We now use Watchdog to monitor the quality of the last hop on Wi-Fi using signal strength and ARP connectivity as indicators to decide if the link is good enough to switch to Wi-Fi as the uplink. ARP pings are useful for link validation but can still get through when the application traffic fails to go through and thus not best indicator real packet loss since they are tiny packets (28 bytes) and have much low chance of packet corruption than the regular data packets. Signal strength and ARP used together ends up working well in tests. The goal is to switch to Wi-Fi after validating ARP transfer and RSSI and then switching out of Wi-Fi when we hit a low signal strength threshold and waiting until the signal strength improves and validating ARP transfer. Change-Id: Ica593291ec7772da892f03cf45b649635b730c47
111 lines
2.5 KiB
Plaintext
111 lines
2.5 KiB
Plaintext
/**
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* Copyright (c) 2008, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.net.wifi;
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import android.net.wifi.WifiInfo;
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import android.net.wifi.WifiConfiguration;
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import android.net.wifi.ScanResult;
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import android.net.DhcpInfo;
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import android.os.Messenger;
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import android.os.WorkSource;
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/**
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* Interface that allows controlling and querying Wi-Fi connectivity.
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*
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* {@hide}
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*/
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interface IWifiManager
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{
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List<WifiConfiguration> getConfiguredNetworks();
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int addOrUpdateNetwork(in WifiConfiguration config);
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boolean removeNetwork(int netId);
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boolean enableNetwork(int netId, boolean disableOthers);
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boolean disableNetwork(int netId);
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boolean pingSupplicant();
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void startScan(boolean forceActive);
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List<ScanResult> getScanResults();
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void disconnect();
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void reconnect();
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void reassociate();
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WifiInfo getConnectionInfo();
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boolean setWifiEnabled(boolean enable);
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int getWifiEnabledState();
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void setCountryCode(String country, boolean persist);
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void setFrequencyBand(int band, boolean persist);
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int getFrequencyBand();
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boolean isDualBandSupported();
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boolean saveConfiguration();
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DhcpInfo getDhcpInfo();
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boolean acquireWifiLock(IBinder lock, int lockType, String tag, in WorkSource ws);
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void updateWifiLockWorkSource(IBinder lock, in WorkSource ws);
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boolean releaseWifiLock(IBinder lock);
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void initializeMulticastFiltering();
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boolean isMulticastEnabled();
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void acquireMulticastLock(IBinder binder, String tag);
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void releaseMulticastLock();
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void setWifiApEnabled(in WifiConfiguration wifiConfig, boolean enable);
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int getWifiApEnabledState();
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WifiConfiguration getWifiApConfiguration();
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void setWifiApConfiguration(in WifiConfiguration wifiConfig);
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void startWifi();
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void stopWifi();
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void addToBlacklist(String bssid);
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void clearBlacklist();
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Messenger getWifiServiceMessenger();
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Messenger getWifiStateMachineMessenger();
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String getConfigFile();
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}
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