当我在Android上设置新的iptables规则以过滤chromecast rtp流时，虚拟机正在关闭

Question

我所做的是为Android上的chromecast屏幕镜像数据包过滤设置一个iptalbes规则，但在我输入此命令并按回车键后，我发现“关闭VM”。

为什么会发生这种事...？如何避免这种情况并使iptables规则起作用？谢谢!

我使用的命令：

su -c "iptables -A OUTPUT -p udp --sport 2346 -m u32 --u32 \"26&0x000000FF=0x0000007F\" -j DROP"

下面是我用logcat捕获的日志：

I/SHELL   ( 7632): START1
I/SHELL   ( 7632): START2: 12578
I/SHELL   ( 7632): GETINPUT
I/SHELL   ( 7632): GETOUTPUT
I/SHELL   ( 7632): GETERROR
E/WifiStateMachine(  792): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=157.29 rxSuccessRate=235.30 targetRoamBSSID=c0:ff:d4:af:ab:0b RSSI=-46




W/iptables(12620): type=1400 audit(0.0:20): avc: denied { create } for scontext=u:r:init:s0 tcontext=u:r:init:s0 tclass=rawip_socket
W/iptables(12620): type=1400 audit(0.0:21): avc: denied { getopt } for lport=255 scontext=u:r:init:s0 tcontext=u:r:init:s0 tclass=rawip_socket
W/iptables(12620): type=1400 audit(0.0:22): avc: denied { setopt } for lport=255 scontext=u:r:init:s0 tcontext=u:r:init:s0 tclass=rawip_socket
D/AndroidRuntime(12634):
D/AndroidRuntime(12634): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
W/app_process32_o(12634): type=1400 audit(0.0:23): avc: denied { write } for name="system@framework@boot.art" dev="mmcblk0p28" ino=105876 scontext=u:r:shell:s0 tcontext=u:object_r:dalvikcache_data_file:s0 tclass=file
D/AndroidRuntime(12634): CheckJNI is OFF
W/app_process32_o(12634): type=1400 audit(0.0:23): avc: denied { write } for name="system@framework@boot.art" dev="mmcblk0p28" ino=105876 scontext=u:r:shell:s0 tcontext=u:object_r:dalvikcache_data_file:s0 tclass=file
D/AndroidRuntime(12634): Calling main entry com.android.commands.am.Am
I/ActivityManager(  792): Start proc eu.chainfire.supersu for broadcast eu.chainfire.supersu/.NativeAccessReceiver: pid=12656 uid=10095 gids={50095, 9997} abi=armeabi-v7a
D/AndroidRuntime(12634): Shutting down VM
D/OpenGLRenderer(12656): Render dirty regions requested: true
D/Atlas   (12656): Validating map...
I/Adreno-EGL(12656): <qeglDrvAPI_eglInitialize:410>: QUALCOMM Build: 10/24/14, 167c270, I68fa98814b
I/OpenGLRenderer(12656): Initialized EGL, version 1.4
D/OpenGLRenderer(12656): Enabling debug mode 0
E/NetworkSession( 6982): Send datagram failed, 199/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 0/200 retries left
E/GCastSender( 6982): An error occurred during send in session 1 (-1, 'Send datagram failed.' (Operation not permitted)).
E/NetworkSession( 6982): writeMore on socket 135 failed w/ error -1 (Operation not permitted)
D/WifiService(  792): releaseWifiLockLocked: WifiLock{CastMirroringProvider type=1 binder=android.os.BinderProxy@25435344}
V/RenderScript(12656): Application requested CPU execution
W/AppOps  (  792): Bad call: specified package com.google.android.gms.chromecast_mirroring under uid 10089 but it is really -1
V/RenderScript(12656): 0xa1c09600 Launching thread(s), CPUs 4
W/AppOps  (  792): Bad call: specified package com.google.android.apps.docs.editors.slides under uid 10089 but it is really 10043
D/audio_hw_primary(  183): adev_set_parameters: enter: 0=;disconnect=32768
E/audio_a2dp_hw(  183): adev_set_parameters: ERROR: set param called even when stream out is null
D/r_submix(  183): out_set_parameters(): shutting down MonoPipe sink
I/r_submix(  183): in_standby()
D/r_submix(  183): out_set_parameters(): shutting down MonoPipe sink
D/r_submix(  183): adev_close_output_stream()
D/audio_hw_primary(  183): out_set_parameters: enter: usecase(1: low-latency-playback) kvpairs: routing=0
I/Converter( 6982): shutting down video encoder
W/GraphicBufferSource(  183): giving up limiting timestamp gap (pts = -1188265760)
W/GraphicBufferSource(  183): Dropped back down to Loaded without Executing
I/OMX-VENC(  183): Component Deinit
I/Converter( 6982): encoder (video/avc) shut down.
I/Converter( 6982): shutting down audio encoder
I/Converter( 6982): encoder (audio/mp4a-latm) shut down.
I/DisplayManagerService(  792): Display device removed: DisplayDeviceInfo{"CCDV": 1280 x 720, 60.0 fps, supportedRefreshRates [], density 213, 213.0 x 213.0 dpi, appVsyncOff 0, presDeadline 16666666, touch NONE, rotation 0, typ
E, FLAG_PRESENTATION}
I/JGCastService( 6982): disable TDLS
V/ActivityManager(  792): Display removed displayId=6
W/ALooperRoster( 6982): failed to deliver message. Target handler not registered.
^C

Answer 1

看起来你可以忽略它。

请注意日志消息中的进程in。进程ID 12634正在为am命令启动，该命令运行Dalvik字节码，因此它启动一个VM。它做了一些工作，然后关闭。我不确定为什么有东西在运行am，但这是另一个问题。