android 6.0wifi 切换,[RK3288][Android6.0] WiFi之无线网络配置的忘记(移除)过程

Platform: Rockchip

OS: Android 6.0

Kernel: 3.10.92

之前有分析过 无线网络配置的保存过程，这里看一下它的移除过程是怎样的，当选择界面的FORGET时，会触发以下流程调用。

onForget　->

forget ->

mWifiManager.forget ->  WiFiSettings.java //参数为当前选择forget的config的netid

sAsyncChannel.sendMessage -> 异步通道发送给WifiStateMachine，cmd是FORGET_NETWORK

processMessage　-> WifiStateMachine.java  //当前处于ConnectedState，调用父类的父类ConnectModeState

mWifiConfigStore.getWifiConfiguration //根据netid得到对应的config

mWifiConfigStore.canModifyNetwork　//检查调用者是否有权限remove network

mWifiConfigStore.forgetNetwork ->

removeConfigAndSendBroadcastIfNeeded ->     //执行清理操作

mConfiguredNetworks.remove　 //从ConfiguredNetworks中移除

mScanDetailCaches.remove

sendConfiguredNetworksChangedBroadcast //发广播wifi状态变化：　WifiManager.CONFIGURED_NETWORKS_CHANGED_ACTION

mWifiNative.removeNetwork　－>

doBooleanCommand //通知WPAS移除network,命令是"REMOVE_NETWORK " + netId，这和用wpa_cli客户端的方法是一样的

mWifiNative.saveConfig　->

doBooleanCommand     //通知ＷPAS更新配置文件wpa_supplicant.conf

handleEvent WifiMonitor.java -> WPAS移除完毕之后会发DISCONNECTED事件过来，由WifiMonitor负责接收

handleNetworkStateChange ->

notifyNetworkStateChange ->

mStateMachine.sendMessage ->  //NETWORK_DISCONNECTION_EVENT, 发给WifiStateMachine

processMessage -> //ConnectedState

dispatchEvent ->  接着WifiMonitor又收到WPAS发来的STATE_CHANGE事件

handleSupplicantStateChange ->

notifySupplicantStateChange -> //

mStateMachine.sendMessage -> //SUPPLICANT_STATE_CHANGE_EVENT

processMessage -> //当前处于ConnectedState，调用父类的父类ConnectModeState

handleNetworkDisconnect ->

stopRssiMonitoringOffload -> //通知HAL stop rssi

mWifiNative.stopRssiMonitoring ->

stopRssiMonitoringNative ->

android_net_wifi_stop_rssi_monitoring_native ->

hal_fn.wifi_stop_rssi_monitoring

clearCurrentConfigBSSID -> //清理bssid

clearConfigBSSID

stopDhcp -> //关dchp,之前有分析过startdhcp的

handlePostDhcpSetup

mDhcpStateMachine.sendMessage  //DhcpStateMachine.CMD_STOP_DHCP

processMessage ->  //DhcpBoundState

processMessage -> //DhcpHaveAddressState的父类DhcpState

transitionTo(mStoppedState) ->

exit -> //DhcpHaveAddressState

setIpAddress ->

mNMService.setInterfaceConfig //通知netd设置ip

mNwService.clearInterfaceAddresses

mNwService.disableIpv6

setNetworkDetailedState    //这部分和ConnectionService有关，打算后面再细讲

mNetworkAgent.sendNetworkInfo

sendNetworkStateChangeBroadcast //广播WifiManager.NETWORK_STATE_CHANGED_ACTION

transitionTo(mDisconnectedState) ->

exit -> //ConnectedState

setScanAlarm //关闭周期性scan

enter -> //DisconnectedState

startScan //断开连接后进入定期扫描