这里NUD(Neighbor Unreachable Detection,邻居不可达检测);控制收到NUD_FAILED后、是否断开网络,主要有两个部分:
1.frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiStateMachine.java
Private Boolean mIpReachabilityDisconnectEnabled = true;
可以通过如下命令控制该变量:
adb shell cmd wifi set-ipreach-disconnect disabled
adb shell cmd wifi get-ipreach-disconnect //查询
IPREACH_DISCONNECT state is false //查询结果,无论wifi on/off都为false
2.高通平台关闭固件部分NUD失败断开网络的变量为:
gEnableNUDTracking