Android系统添加USB以太网支持

参考：

http://blog.csdn.net/weiqing1981127/article/details/8521600

http://blog.chinaunix.net/uid-9863638-id-1996328.html

http://www.360doc.com/content/13/1223/16/14797374_339539334.shtml

http://blog.csdn.net/tankai19880619/article/details/39550819

http://www.verydemo.com/demo_c281_i988.html

http://www.android-x86.org/#Development

 

一.以太网framework分析

 

启动流程：SystemServer类的main函数：The main entry point from zygote，开机的时候执行

main ： SystemServer.java (frameworks\base\services\java\com\android\server)

      new SystemServer().run(); 

            run //系统server的初始化

                 startOtherServices(); //初始化startBootstrapServices();，startCoreServices();之后

                        ServiceManager.addService(Context.NETWORKMANAGEMENT_SERVICE, networkManagement);

                        mSystemServiceManager.startService(ETHERNET_SERVICE_CLASS); //初始化Internet server

                              //SystemServiceManager.java (frameworks\base\services\core\java\com\android\server)

                             startService(String className)  //Starts a service by class name.    //SystemServiceManager.java (frameworks\base\services\core\java\com\android\server)

                                 startService(serviceClass);  //Creates and starts a system service

                                      service = constructor.newInstance(mContext); //构建一个实例

                                      mServices.add(service); //注册sever

                                      service.onStart();  //启动servece

                                   

 

EthernetService : 这里我们分析的severce是internet的

//EthernetService.java (frameworks\opt\net\ethernet\java\com\android\server\ethernet)

new EthernetServiceImpl(context);  //new EthernetServiceImpl

publishBinderService(Context.ETHERNET_SERVICE, mImpl); 启动EthernetServiceImpl的start\

     //EthernetServiceImpl.java (frameworks\opt\net\ethernet\java\com\android\server\ethernet),用来操作以太网

     EthernetServiceImpl //构造函数

          new EthernetConfigStore(); //This class provides an API to store and manage Ethernet network configuration.

                readIpAndProxyConfigurations

                writeIpAndProxyConfigurations

          new EthernetNetworkFactory(mListeners);  //Manages connectivity for an Ethernet interface.

                //EthernetNetworkFactory.java (frameworks\opt\net\ethernet\java\com\android\server\ethernet)

                new NetworkInfo(ConnectivityManager.TYPE_ETHERNET, 0, NETWORK_TYPE, "");  //Describes the status of a network interface.

                new LinkProperties(); //Describes the properties of a network link.

                initNetworkCapabilities(); //设置网卡的功能

     start() //EthernetServiceImpl的执行函数，Starting Ethernet service

          new HandlerThread("EthernetServiceThread");  //初始化 Thread，创建线程Handy class for starting a new thread that has a looper

          handlerThread.start(); //启动线程

          new Handler(handlerThread.getLooper()); //用来发送和处理与线程消息队列相关的Message以及Runnable对象

          mTracker.start(mContext, mHandler); //执行EthernetNetworkFactory类中的start

                start //EthernetNetworkFactory中，Begin monitoring connectivity

                      mIfaceMatch = context.getResources().getString(com.android.internal.R.string.config_ethernet_iface_regex); // Interface match regex.匹配

                      mFactory = new LocalNetworkFactory(NETWORK_TYPE, context, target.getLooper()); // Create and register our NetworkFactory.

                      mFactory.register(); 

                      mInterfaceObserver = new InterfaceObserver(); //Start tracking interface change events.

                      mNMService.listInterfaces(); // If an Ethernet interface is already connected, start tracking that.

                      updateInterfaceState(iface, true); //We have our interface. Track it.//注册

                mFactory.setScoreFilter(up ? NETWORK_SCORE : -1); //设置scroe值；这个是网络优先级判断依据

          mStarted.set(true); //设置serverce已经启动

 

 

 

二.以太网mt6735移植-kernel部分

   

     1.config里面添加一些宏定义

          +ONFIG_MISC_VIA=y

+CONFIG_USB_USBNET=y

+CONFIG_USB_NET_AX8817X=y

+CONFIG_USB_NET_CDCETHER=y

+CONFIG_USB_NET_CDC_EEM=y

+CONFIG_USB_NET_CDC_NCM=y

+CONFIG_USB_NET_DM9601=y

+CONFIG_USB_NET_SMSC75XX=n

+CONFIG_USB_NET_SMSC95XX=n

+CONFIG_USB_NET_GL620A=n

+CONFIG_USB_NET_NET1080=y

+CONFIG_USB_NET_PLUSB=y

+CONFIG_USB_NET_MCS7830=n

+CONFIG_USB_NET_RNDIS_HOST=y

+CONFIG_USB_NET_CDC_SUBSET=y

+CONFIG_USB_ALI_M5632=n

+CONFIG_USB_AN2720=n

+CONFIG_USB_BELKIN=y

+CONFIG_USB_ARMLINUX=y

+CONFIG_USB_EPSON2888=n

+CONFIG_USB_KC2190=n

+CONFIG_USB_NET_ZAURUS=y

+CONFIG_USB_NET_CX82310_ETH=n

+CONFIG_USB_NET_KALMIA=n

+CONFIG_USB_NET_QMI_WWAN=n

+CONFIG_USB_HSO=y

+CONFIG_USB_NET_INT51X1=n

+CONFIG_USB_CDC_PHONET=n

+CONFIG_USB_IPHETH=n

+CONFIG_USB_SIERRA_NET=n

+CONFIG_USB_VL600=n

 

 

 

三.以太网mt6735移植-中间层部分

    1.DHCP的util

        system/core/libnetutils/dhcp_utils.c的dhcp_do_request函数403行

        这里主要是自动分配ip的一个文件，这里需要改动下参数

    原来：

          // snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s:-A -f %s -h %s %s", DAEMON_NAME,

          //           p2p_interface,DHCP_CONFIG_PATH, prop_value, interface); 

    改成：

           snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s", DAEMON_NAME, interface);

          ALOGE("dhcp_do_request property_get ok daemon_cmd = %s", daemon_cmd);

 

     原来：

          // snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s:-A -f %s %s", DAEMON_NAME, p2p_interface,

          //         DHCP_CONFIG_PATH, interface);

     改成：

           snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s", DAEMON_NAME, interface);

            ALOGE("dhcp_do_request property_get fail daemon_cmd = %s", daemon_cmd);

 

    2.加上系统sevice

        +//Add for usb to RJ45 Ethernet

        +service dhcpcd_eth0 /system/bin/dhcpcd -ABKL -d eth0

        +   class main

        +   disabled

        +   oneshot

        +//End

 

        +//Add for usb to RJ45 Athernet

        +service iprenew_eth0  /system/bin/dhcpcd -n

        +     class main

        +     disabled

        +     oneshot

 

 

 

四.以太网mt6735移植-framework部分

    1.启动ETHERNET_SERVICE_CLASS

    frameworks/base/services/java/com/android/server/SystemServer.java的startOtherServices函数里面：

      // if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_ETHERNET)) {

                  Slog.e(TAG, "on mSystemServiceManager.startService");

                 mSystemServiceManager.startService(ETHERNET_SERVICE_CLASS);  //启动service

      // }

 

    2.在标准的Framework中添加自己的新的资源

      frameworks/base/core/res/res/values/config.xml 这是framework的默认配置

        <string-array name="config_statusBarIcons"> //这里是添加配置栏

              +<item><xliff:g id="id">ethernet</xliff:g></item>

    

        <string-array translatable="false" name="networkAttributes"> //这里是framework里面需要的属性

             +<item>"ethernet,9,9,1,-1,true"</item>

      

        <string-array translatable="false" name="radioAttributes">  //这里是添加无线的属性

             +<item>"9,9"</item>

 

        +<string-array translatable="false" name="config_tether_ethernet_regexs"> //这里是加入一个端点，比如eth0

                +<item>"eth\\d"</item>

          +</string-array>

 

    3.在系统的framework/base/core/res/res中添加字串等资源，需要在framework/base/core/res/res/values/symbols.xml中同步添加资源字串，否则编译会出错。

      frameworks/base/core/res/res/values/symbols.xml //这里添加是因为在config.xml里面添加了新的一栏

         <java-symbol type="array" name="config_tether_ethernet_regexs" />

 

 

 

 

四.以太网mt6735移植-app部分(Setting)

   1.packages/apps/Settings/AndroidManifest.xml, 注册一些东西

 <!-- Ethernet controls -->
                  <activity android:name=".EthernetSettings"
                          android:label="@string/eth_radio_ctrl_title"
                          >
                      <intent-filter>
                          <action android:name="android.intent.action.MAIN" />
                          <action android:name="android.settings.ETHERNET_SETTINGS" />
                          <category android:name="android.intent.category.DEFAULT" />
                          <category android:name="android.intent.category.VOICE_LAUNCH" />
                      </intent-filter>
                  </activity>
     
                  <activity android:name=".ethernet.EthernetEnabler" android:label="@string/eth_setting"
                          android:clearTaskOnLaunch="true"
                          >
                      <intent-filter>
                          <action android:name="android.intent.action.MAIN" />
                          <action android:name="android.settings.ETHERNET_SETTINGS" />
                          <category android:name="android.intent.category.DEFAULT" />
                          <category android:name="android.intent.category.VOICE_LAUNCH" />
                          <category android:name="com.android.settings.SHORTCUT" />
                      </intent-filter>
                  </activity>
                  <activity android:name=".ethernet.EthernetConfigDialog" android:label="@string/eth_conf_perf_title"
                          android:clearTaskOnLaunch="true"
                          >
                      <intent-filter>
                          <action android:name="android.intent.action.MAIN" />
                          <action android:name="android.settings.ETHERNET_SETTINGS" />
                          <category android:name="android.intent.category.DEFAULT" />
                          <category android:name="android.intent.category.VOICE_LAUNCH" />
                           <category android:name="com.android.settings.SHORTCUT" />
                   </intent-filter>
              </activity>

 

    2.增加eth用的的字符串资源

    packages/apps/Settings/res/values/strings.xml

  <!-- Ethernet configuration dialog -->
    <string name="eth_config_title">Configure Ethernet device</string>
    <string name="eth_setting">Ethernet setting</string>
    <string name="eth_dev_list">Ethernet Devices:</string>
    <string name="eth_con_type">Connection Type</string>
    <string name="eth_con_type_dhcp">DHCP</string>
    <string name="eth_con_type_manual">Static IP</string>
    <string name="eth_dns1">DNS address 1</string>
    <string name="eth_dns2">DNS address 2</string>
    <string name="eth_gw">Gateway address</string>
    <string name="eth_ipaddr">IPv4 address</string>
    <string name="eth_quick_toggle_title">Ethernet</string>
    <string name="eth_quick_toggle_summary">Turn on Ethernet</string>
    <string name="eth_radio_ctrl_title">Ethernet</string>
    <string name="eth_conf_perf_title">Ethernet configuration</string>
    <string name="eth_conf_summary">Configure Ethernet devices</string>
    <string name="eth_pre_length">Network prefix length</string>
    <string name="eth_toggle_summary_off">Turn off Ethernet</string>
    <string name="eth_toggle_summary_on">Turn on Ethernet</string>

 

    3.添加Setting子菜单

    packages/apps/Settings/res/xml/dashboard_categories.xml

     <!-- Ethernet -->
             <dashboard-tile
                android:id="@+id/ethernet_settings"
                android:title="@string/eth_radio_ctrl_title"
                android:fragment="com.android.settings.EthernetSettings"
                android:icon="@drawable/ic_settings_ethernet" />

    所谓的dashboard就是Settings模块首界面的一个抽象。而dashboard-categorys则是设置分类集合的抽象，而dashboard-category是分类的抽象，dashboard-tile就是分类下每个选项的抽象了。代码中的List<DashboardCategory>对应dashboard-categorys， DashboardCategory对应dashboard-category，而dashboard-tile则对因代码中的DashboardTile。

 

    

    4.eth图标, layout文件，媒体声音，Seting文件

    图标：packages/apps/Settings/res/drawable-hdpi/

       ,附件ic_settings_ethernet.png

 

    layout：packages/apps/Settings/res/layout/

        

    

    媒体声音：packages/apps/Settings/res/raw/

    

 

    Seting文件：packages/apps/Settings/res/xml/ethernet_settings.xml

   

 

    5.Setting程序：packages/apps/Settings/src/com/android/settings/EthernetSettings.java

    setting的一些操作

   子activity文件：packages/apps/Settings/src/com/android/settings/ethernet