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Android 13 移植EthernetSettings/Ethernet更新

news 来源：原创 2024/9/20 7:48:41

移植EthernetSettings

Android 13 在Settings搜索没有发现以太网设置,应该是移除了,但是客户的设备需要,所以移植Android 11的.

以太网相关的功能在Android13中进行模块化,提取到packages/modules/Connectivity/中,
EthernetManager相关代码从framework移到packages/modules/Connectivity/下.

Android 13 internet界面有无网络,会显示不同的界面!

--- a/packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetServiceImpl.java
+++ b/packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetServiceImpl.java
@@ -16,11 +16,16 @@package com.android.server.ethernet;+import static android.net.EthernetManager.ETHERNET_STATE_DISABLED;
+import static android.net.EthernetManager.ETHERNET_STATE_ENABLED;import static android.net.NetworkCapabilities.TRANSPORT_TEST;import android.annotation.NonNull;import android.annotation.Nullable;
+import android.content.BroadcastReceiver;import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;@@ -63,6 +69,14 @@ public class EthernetServiceImpl extends IEthernetManager.Stub {mContext = context;mHandler = handler;mTracker = tracker;
+        //add xxx
+        IntentFilter intentFilter = new IntentFilter();
+        intentFilter.addAction("xx.action.xx.ethernet.open");
+        intentFilter.addAction("xx.action.xx.ethernet.close");
+        mEthernetSwitchBroadcast = new EthernetSwitchBroadcastReceiver();
+        context.registerReceiver(mEthernetSwitchBroadcast, intentFilter);
+        //add xxx
+}private void enforceAutomotiveDevice(final @NonNull String methodName) {
@@ -77,9 +91,63 @@ public class EthernetServiceImpl extends IEthernetManager.Stub {public void start() {Log.i(TAG, "Starting Ethernet service");
-        mTracker.start();
-        mStarted.set(true);
+        //add xxx
+        //mTracker.start();
+        //mStarted.set(true);
+        mEthernetState = getEthernetState();
+        boolean is_enabled = false;
+        if (mEthernetState == ETHERNET_STATE_ENABLED) {
+            is_enabled = true;
+        }
+        mTracker.start(is_enabled);
+        mStarted.set(is_enabled);
+        //add xxx
+    }
+
+    //add xxx
+    private EthernetSwitchBroadcastReceiver mEthernetSwitchBroadcast;
+    private int mState = -1;
+    private int mEthernetState; //-1 init 0 disable 1 enable
+
+    private int getEthernetState() {
+        int state = SystemProperties.getInt("xxx_ethernet_on", 0);
+        return state;
+    }
+
+    private void setEthernetState(int state) {
+        //SystemProperties.set("xxx__ethernet_on", state + "");
+    }
+
+    public synchronized void setState(int state) {
+        Log.i(TAG, "setState from mState=" + mState + " to state=" + state);
+        if (mState != state) {
+            mState = state;
+            if (state == ETHERNET_STATE_DISABLED) {
+                //setEthernetState(ETHERNET_STATE_DISABLED);
+                mTracker.setIntefaceState(false);
+                mStarted.set(false);
+            } else {
+                //setEthernetState(ETHERNET_STATE_ENABLED);
+                mTracker.setIntefaceState(true);
+                mStarted.set(true);
+            }
+        }
+    }
+
+    class EthernetSwitchBroadcastReceiver extends BroadcastReceiver {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            String action = intent.getAction();
+            Log.d(TAG, "EthernetSwitchBroadcastReceiver action:" + action);
+            if (action.equals("xx.action.xx.ethernet.open")) {
+                setState(ETHERNET_STATE_ENABLED);
+            } else if (action.equals("xx.action.xx.ethernet.close")) {
+                setState(ETHERNET_STATE_DISABLED);
+            }
+
+        }}
+    //add xxxprivate void throwIfEthernetNotStarted() {if (!mStarted.get()) {
diff --git a/packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetTracker.java b/packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetTracker.java
index 1c02a6625f..34c8c8dc8d 100644
--- a/packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetTracker.java
+++ b/packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetTracker.java
@@ -43,6 +43,7 @@ import android.os.Handler;import android.os.RemoteCallbackList;import android.os.RemoteException;import android.os.ServiceSpecificException;
+import android.provider.Settings;import android.text.TextUtils;import android.util.ArrayMap;import android.util.Log;
@@ -173,7 +174,12 @@ public class EthernetTracker {mConfigStore = new EthernetConfigStore();}+    //add xxxvoid start() {
+        start(true);
+    }
+
+    void start(boolean isEnabled) {mFactory.register();mConfigStore.read();@@ -191,8 +197,31 @@ public class EthernetTracker {Log.e(TAG, "Could not register InterfaceObserver " + e);}-        mHandler.post(this::trackAvailableInterfaces);
+        if (isEnabled) {
+            mHandler.post(this::trackAvailableInterfaces);
+        }
+    }
+
+    public synchronized void setIntefaceState(boolean isFaceUp) {
+        try {
+            String[] interfaces = getInterfaces(true);
+            for (String iface : interfaces) {
+                if (isTrackingInterface(iface)) {
+                    if (isFaceUp) {
+                        NetdUtils.setInterfaceUp(mNetd, iface);
+                    } else {
+                        NetdUtils.setInterfaceDown(mNetd, iface);
+                    }
+                }
+            }
+            if (isFaceUp) {
+                mHandler.post(this::trackAvailableInterfaces);
+            }
+        } catch (Exception e) {
+            Log.e(TAG, "Error change eth isFaceUp : " + isFaceUp);
+        }}
+    //add xxxvoid updateIpConfiguration(String iface, IpConfiguration ipConfiguration) {if (DBG) {
@@ -521,7 +550,7 @@ public class EthernetTracker {}final String hwAddress = config.hwAddr;
-
+        Settings.System.putString(mContext.getContentResolver(), "sys_tex_hwAddress", hwAddress);//add xx xxNetworkCapabilities nc = mNetworkCapabilities.get(iface);if (nc == null) {// Try to resolve using mac address

Android13 有线网开关研究
Android13 原生以太网实现设置静态IP
Android13 MTK平台添加以太网设置静态IP菜单

问题补充:再/packages/modules/Connectivity/service-t/src/com/android/server/ethernet/ 目录下,
想利用SystemProperties.set()保存数据,但是编译报错,error: cannot find symbol,但是我明明导入了！
为什么这么确认我导入,因为还引用了SystemProperties.getInt().然后控制变量,定位到问题是SystemProperties.set()无法再这个目录使用.
为什么会有这个问题呢？我百度大法，有了一些大致的猜想!然后去查看了它的Android.bp

packages/modules/Connectivity/service-t/Android.bp// This builds T+ services depending on framework-connectivity-t
// hidden symbols separately from the S+ services, to ensure that S+
// services cannot accidentally depend on T+ hidden symbols from
// framework-connectivity-t.
java_library {name: "service-connectivity-tiramisu-pre-jarjar",sdk_version: "system_server_current",// TODO(b/210962470): Bump this to at least S, and then T.min_sdk_version: "30",srcs: [":service-connectivity-tiramisu-sources",],libs: [

问题可能关于sdk_version这个属性有关!
当然上面的都只是猜测,只是做个记录,为什么无法编译的bug还没解决.

然后去询问大佬,大佬提供一个思路,让我用反射去调用它,确实编译通过了,数据也能保存.
(ps:我太执着于解决那个编译报错,而忘记了自己的目的!目的是啥,是利用SystemProperties.set()保存数据,
既然(正常)固定的调用方式编译报错,然后一时半会又搞不定编译报错(难点:报错信息不够明确,无法定位).
应该先去想还有什么其它的方式可能调用SystemProperties.set(),先达成目的,然后再回来想想那个编译报错.)

+++ b/packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetTracker.java
+import java.lang.reflect.Method;
@@ -551,6 +552,7 @@ public class EthernetTracker {final String hwAddress = config.hwAddr;
+        setProperty("sys.xxx.xxx",hwAddress);NetworkCapabilities nc = mNetworkCapabilities.get(iface);if (nc == null) {// Try to resolve using mac address
@@ -578,6 +580,17 @@ public class EthernetTracker {}}+    //add text
+    private void setProperty(String key, String value){
+        try {
+            Class<?> c =  Class.forName("android.os.SystemProperties");
+            Method method = c.getMethod("set",String.class,String.class);
+            method.invoke(c,key,value);
+        }catch (Exception e){
+            Log.d(TAG,"xxxxxxxxxx");
+        }
+    }
+    //add text

大佬的博客,感谢大佬
Android 使用反射机制获取或设置系统属性
Android高版本源码编译提示error: cannot find symbol
内置 APP 如何访问隐藏 API

Ethernet更新

新增以太网打开关闭的函数

./packages/modules/Connectivity/framework-t/src/android/net/EthernetManager.java@RequiresPermission(anyOf = {NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,android.Manifest.permission.NETWORK_STACK,android.Manifest.permission.NETWORK_SETTINGS})@SystemApi(client = MODULE_LIBRARIES)public void setEthernetEnabled(boolean enabled) {try {mService.setEthernetEnabled(enabled);} catch (RemoteException e) {throw e.rethrowFromSystemServer();}}
//需要权限和系统应用签名(SystemApi)

Android 13 Ethernet变更

Anrdoir 13 adout static net ip

frameworks/base/core/java/android/net/EthernetManager.java //上层用于管理以太网,app可调用packages/modules/Connectivity/framework/src/android/net/IpConfiguration.java//用来配置动态/静态IPpackages/modules/Connectivity/framework/src/android/net/StaticIpConfiguration.java //静态IP参数类

ConnectivityService 日志TAG

import java.net.Inet4Address;
import java.net.InetAddress;
import android.net.EthernetManager;
import android.net.IpConfiguration;
import android.net.IpConfiguration.IpAssignment;
import android.net.IpConfiguration.ProxySettings;
import android.net.wifi.SupplicantState;
import android.net.wifi.WifiInfo;
import android.net.StaticIpConfiguration;
import android.net.LinkAddress;
import android.net.LinkProperties;private void setTextStaticIpConfiguration(Intent intent) {String ethMode = null;          // "static";String ethIpAddress = null;     //"192.168.1.xxx";String ethNetmask = null;       // "255.255.255.0";String ethGateway = null;       // "192.168.x.x";String ethdns1 = null;          // "192.168.x.x";String ethdns2 = null;          //"null";mEthManager = (EthernetManager)getSystemService(Context.ETHERNET_SERVICE);if (mEthManager == null) {Log.i(TAG, "setTextStaticIpConfiguration: fail to getSystemService :  " + Context.ETHERNET_SERVICE);}String[] ifaces = mEthManager.getAvailableInterfaces();if (ifaces.length > 0) {mIfaceName = ifaces[0];//"eth0";}if (null == mIfaceName) {Log.e(TAG, "setTextStaticIpConfiguration: get ethernet ifaceName failed");return;}Bundle bundle = intent.getExtras();if (bundle.getString("netMode") != null)ethMode = bundle.getString("netMode");if (bundle.getString("ipaddr") != null)ethIpAddress = bundle.getString("ipaddr");if (bundle.getString("netMask") != null)ethNetmask = bundle.getString("netMask");if (bundle.getString("gateway") != null)ethGateway = bundle.getString("gateway");if (bundle.getString("dns1") != null)ethdns1 = bundle.getString("dns1");if (bundle.getString("dns2") != null)ethdns2 = bundle.getString("dns2");Log.d(TAG, "static net:" + ethMode + "#" + ethIpAddress + "#" + ethNetmask + "#" + ethGateway + "#" + ethdns1 + "#" + ethdns2);if (ethMode == null || ethMode.equals("static")) {Inet4Address inetAddr = getIPv4Address(ethIpAddress);int prefixLength = maskStr2InetMask(ethNetmask);Inet4Address gatewayAddr = getIPv4Address(ethGateway);Inet4Address dnsAddr1 = getIPv4Address(ethdns1);Inet4Address dnsAddr2 = getIPv4Address(ethdns2);if (inetAddr == null || gatewayAddr == null || prefixLength <= 0) {Log.e(TAG, "ip, mask or dnsAddr is wrong-null");return;}if (inetAddr.getAddress().toString().isEmpty() || prefixLength == 0 || gatewayAddr.toString().isEmpty()) {Log.e(TAG, "ip,mask or dnsAddr is wrong-isEmpty");return;}List<InetAddress> arrayList = new ArrayList();if (dnsAddr1 != null && !dnsAddr1.toString().isEmpty()) {arrayList.add(dnsAddr1);}if (dnsAddr2 != null && !dnsAddr2.toString().isEmpty()) {arrayList.add(dnsAddr2);}mStaticIpConfiguration = new StaticIpConfiguration.Builder().setIpAddress(new LinkAddress(inetAddr, prefixLength)).setGateway(gatewayAddr).setDnsServers(arrayList).build();mIpConfiguration = new IpConfiguration();mIpConfiguration.setIpAssignment(IpAssignment.STATIC);mIpConfiguration.setProxySettings(IpConfiguration.ProxySettings.NONE);mIpConfiguration.setStaticIpConfiguration(mStaticIpConfiguration);mEthManager.setConfiguration("eth0", mIpConfiguration);}}

关于设置静态ip后,设备重启后失效. 怀疑是静态ip没有被保存在系统,然后重启后ip切换为动态.
然后查看日志,确实如此:E DelayedDiskWrite: Error writing data file...

08-13 02:53:24.929   713   876 I EthernetTracker: updateIpConfiguration, iface: eth0, cfg: IP assignment: STATIC
08-13 02:53:24.929   713   876 I EthernetTracker: Static configuration: IP address 192.168.1.254/24 Gateway 192.168.1.1  DNS servers: [ 192.168.1.1 ] Domains 
08-13 02:53:24.929   713   876 I EthernetTracker: Proxy settings: NONE
08-13 02:53:24.932   713  2160 E DelayedDiskWrite: Error writing data file /data/misc/apexdata/com.android.tethering/misc/ethernet/ipconfig.txt
08-13 02:53:24.932   713   839 D EthernetNetworkFactory: updateInterface, iface: eth0, ipConfig: IP assignment: STATIC
08-13 02:53:24.932   713   839 D EthernetNetworkFactory: Static configuration: IP address 192.168.1.254/24 Gateway 192.168.1.1  DNS servers: [ 192.168.1.1 ] Domains 
08-13 02:53:24.932   713   839 D EthernetNetworkFactory: Proxy settings: NONE
08-13 02:53:24.932   713   839 D EthernetNetworkFactory: , old ipConfig: IP assignment: DHCP
08-13 02:53:24.932   713   839 D EthernetNetworkFactory: Proxy settings: NONE
08-13 02:53:24.932   713   839 D EthernetNetworkFactory: , capabilities: null, old capabilities: [ Transports: ETHERNET Capabilities: NOT_METERED&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&NOT_ROAMING&NOT_CONGESTED&NOT_SUSPENDED&NOT_VCN_MANAGED LinkUpBandwidth>=100000Kbps LinkDnBandwidth>=100000Kbps Specifier: <EthernetNetworkSpecifier (eth0)> UnderlyingNetworks: Null], listener: null
08-13 02:53:24.932   713   839 D EthernetNetworkFactory: reconnecting Ethernet
08-13 02:53:24.969   713  1219 D DhcpClient: doQuit
08-13 02:53:24.996   713  1219 D DhcpClient: DHCP Packet Handler stopped
08-13 02:53:24.997   713  1219 D DhcpClient: onQuitting
08-13 02:53:25.025   713   839 D EthernetNetworkFactory: Starting Ethernet IpClient(eth0)
08-13 02:53:25.025   713   840 D ConnectivityService: [100 ETHERNET] EVENT_NETWORK_INFO_CHANGED, going from CONNECTED to DISCONNECTED
08-13 02:53:25.025   713   840 D ConnectivityService: [100 ETHERNET] disconnected, was satisfying 17
08-13 02:53:25.030   713   839 I EthernetNetworkFactory: Ignoring stale IpClientCallbacks com.android.server.ethernet.EthernetNetworkFactory$NetworkInterfaceState$EthernetIpClientCallback@1a9aff9
08-13 02:53:25.031   713   839 D EthernetNetworkAgent: NetworkAgent: NetworkAgent channel lost

Android 13 有线以太网静态ip保存逻辑梳理分析

//1.0
EthernetManager mEthManager = (EthernetManager)getSystemService(Context.ETHERNET_SERVICE);
mIpConfiguration = new IpConfiguration();
....
mEthManager.setConfiguration("eth0", mIpConfiguration);//去设置静态IP//1.1
packages/modules/Connectivity/framework-t/src/android/net/EthernetManager.javapublic void setConfiguration(@NonNull String iface, @NonNull IpConfiguration config) {try {mService.setConfiguration(iface, config);} catch (RemoteException e) {throw e.rethrowFromSystemServer();}}//1.2   
packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetServiceImpl.java@Overridepublic void setConfiguration(String iface, IpConfiguration config) {...// Fix this by making IpConfiguration a complete representation of static configuration.mTracker.updateIpConfiguration(iface, new IpConfiguration(config));}//1.3 
packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetTracker.javavoid updateIpConfiguration(String iface, IpConfiguration ipConfiguration) {if (DBG) {Log.i(TAG, "updateIpConfiguration, iface: " + iface + ", cfg: " + ipConfiguration);}writeIpConfiguration(iface, ipConfiguration);//写入IpConfiguration相关信息,主要和静态ip关联mHandler.post(() -> {mFactory.updateInterface(iface, ipConfiguration, null, null);//更新ipConfigurationbroadcastInterfaceStateChange(iface);//发送通知,告诉系统网络接口改变});}private void writeIpConfiguration(@NonNull final String iface,@NonNull final IpConfiguration ipConfig) {mConfigStore.write(iface, ipConfig);mIpConfigurations.put(iface, ipConfig);}//1.4 
packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetConfigStore.java  private static final String CONFIG_FILE = "ipconfig.txt";private static final String FILE_PATH = "/misc/ethernet/";private static final String LEGACY_IP_CONFIG_FILE_PATH = Environment.getDataDirectory()+ FILE_PATH;private static final String APEX_IP_CONFIG_FILE_PATH = ApexEnvironment.getApexEnvironment(TETHERING_MODULE_NAME).getDeviceProtectedDataDir() + FILE_PATH;  private IpConfigStore mStore = new IpConfigStore();//关于读    public void read() {read(APEX_IP_CONFIG_FILE_PATH, LEGACY_IP_CONFIG_FILE_PATH, CONFIG_FILE);}//关于写public void write(String iface, IpConfiguration config) {write(iface, config, APEX_IP_CONFIG_FILE_PATH + CONFIG_FILE);}@VisibleForTestingvoid write(String iface, IpConfiguration config, String filepath) {boolean modified;synchronized (mSync) {if (config == null) {modified = mIpConfigurations.remove(iface) != null;} else {IpConfiguration oldConfig = mIpConfigurations.put(iface, config);modified = !config.equals(oldConfig);}if (modified) {mStore.writeIpConfigurations(filepath, mIpConfigurations);}}}//1.5 
packages/modules/Connectivity/service-t/src/com/android/server/net/IpConfigStore.java//最后是这里写入@VisibleForTestingpublic static boolean writeConfig(DataOutputStream out, String configKey,IpConfiguration config, int version) throws IOException {boolean written = false;try {switch (config.getIpAssignment()) {case STATIC:out.writeUTF(IP_ASSIGNMENT_KEY);out.writeUTF(config.getIpAssignment().toString());StaticIpConfiguration staticIpConfiguration = config.getStaticIpConfiguration();if (staticIpConfiguration != null) {if (staticIpConfiguration.getIpAddress() != null) {LinkAddress ipAddress = staticIpConfiguration.getIpAddress();out.writeUTF(LINK_ADDRESS_KEY);out.writeUTF(ipAddress.getAddress().getHostAddress());out.writeInt(ipAddress.getPrefixLength());}if (staticIpConfiguration.getGateway() != null) {out.writeUTF(GATEWAY_KEY);out.writeInt(0);  // Default route.out.writeInt(1);  // Have a gateway.out.writeUTF(staticIpConfiguration.getGateway().getHostAddress());}for (InetAddress inetAddr : staticIpConfiguration.getDnsServers()) {out.writeUTF(DNS_KEY);out.writeUTF(inetAddr.getHostAddress());}}written = true;break;case DHCP:out.writeUTF(IP_ASSIGNMENT_KEY);out.writeUTF(config.getIpAssignment().toString());written = true;break;case UNASSIGNED:/* Ignore */break;...}

Android 12 之前数据保存于/data/misc/ethernet/ipconfig.txt.

根据上面分析的流程,数据是要被写入/data/misc/apexdata/com.android.tethering/misc/ethernet/ipconfig.txt,但是日志报错,说明写入失败了.
一般文件写入失败的原因,大多数是权限问题,但是这个日志么有看到关于权限的信息,所以排除.
AS(Android studio)或者adb查看设备是否有这个文件,发现都没有/misc/ethernet/这个目录,这可能就是导致无法写入的原因

xx:/ # ls -al /data/misc/apexdata/com.android.tethering/
total 9
drwxrwx--x  3 root   system 3452 2024-08-13 08:47 .
drwx--x--x 27 root   root   3452 2024-08-13 08:47 ..
drwx------  2 system system 3452 2024-08-13 08:51 netstats

所以创建一下这个目录,验证之后,解决问题,代码如下:

packages/modules/Connectivity/service-t/src/com/android/server/ethernet/EthernetConfigStore.java  void write(String iface, IpConfiguration config, String filepath) {boolean modified;synchronized (mSync) {if (config == null) {modified = mIpConfigurations.remove(iface) != null;} else {IpConfiguration oldConfig = mIpConfigurations.put(iface, config);modified = !config.equals(oldConfig);}if (modified) {//add textfinal File text_dir = new File(APEX_IP_CONFIG_FILE_PATH);if(!text_dir.exists()){text_dir.mkdirs();}//add textmStore.writeIpConfigurations(filepath, mIpConfigurations);}}}

Android T设置静态ip地址,如果设置错误的网关,有线网会一直断开重连.设置正常的网关不会出现.
Android 13 设置静态ip导致有线网一直断开重连分析解决
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