关于Android IP LOST_PROVISIONING 的机制

AnroidP在WiFi连接的时候，偶尔会出现断开现象，并打印下列log

W/IpClient.wlan0: [IpReachabilityMonitor] WARN ALERT neighbor went from: NeighborEvent{@2534961,RTM_NEWNEIGH,if=23,fe80::1,NUD_PROBE,[<MYMACHERE>]} to: NeighborEvent{@2537970,RTM_NEWNEIGH,if=23,fe80::1,NUD_FAILED,[null]} W/IpReachabilityMonitor: FAILURE: LOST_PROVISIONING, NeighborEvent{@2537970,RTM_NEWNEIGH,if=23,fe80::1,NUD_FAILED,[null]}

从log上来看系统有开启IpReachabilityMonitor 机制，可能是在干扰严重环境下或相对弱信号下让系统误判导致下断线

关闭 IpReachabilityMonitor 强制断连机制

方法1：

在源码中修改成默认disable

Android 7

frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiStateMachine.java

- private boolean mIpReachabilityDisconnectEnabled = true;

+ private boolean mIpReachabilityDisconnectEnabled = false;

Android 11

frameworks/opt/net/wifi/service/java/com/android/server/wifi/ClientModeImpl.java

- private boolean mIpReachabilityDisconnectEnabled = tr