有线Ethernet流程

updateLinkProperties()

mNMService.setInterfaceUp(iface);打开ethernet 接口

2. 系统运行到阶段PHASE_SYSTEM_SERVICES_READY时，系统会调用EthernetService.java 的onBootPhase()函数，运行EthernetServiceImpl服务

AIDL

EthernetNetworkFactory.java

start()

retstart()

network.setIpConfig(ipConfiguration);

updateIpConfiguration()

跟踪以太网接口并管理接口配置

 mImpl.start()

 EthernetNetworkFactory.NetworkInterfaceState

当ethernet cable接入或拔掉或eth0 接口up/down时

EthernetService.java

EthernetTracker()

reconnectEthernet()

读取ethernet db：/data/misc/ethernet/ipconfig.txt

ConnectivityService服务

EthernetTracker.java

network.stop();

onIpClientCreated()

iface = new NetworkInterfaceState()创建对象NetworkInterfaceState，于保存一些network info：NetworkInfo、NetworkAgent、IpConfiguration、IIpClient等

 EthernetNetworkFactory.IpClientCallbacksImpl

onBootPhase()

addInterface(iface)

trackAvailableInterfaces()

EthernetServiceImpl mImpl = new EthernetServiceImpl(context)

stop()清除对象NetworkInfo、NetworkAgent、IpConfiguration、IIpClient等

Ethernet Framework框图

config = mNMService.getInterfaceConfig(iface);读取配置

EthernetConfigStore

EthernetManager.java

AOSP Ethernet 目录：/frameworks/opt/net/ethernet/java/com/android/server/ethernet/

NetworkStack服务中通过注册监听器IpClientLinkObserver 来获得Ethernet接口 ip变化消息，然后发送消息EVENT_NETLINK_LINKPROPERTIES_CHANGED，最终回调对象EthernetNetworkFactory.IpClientCallbacksImpl 对应的callbak函数。目录：NetworkStack/src/android/net/ip/IpClient.java

mNMService.registerObserver(new InterfaceObserver())作用： 当ethernet cable接入或拔掉，由NMservice通知并调用InterfaceObserver的callback

start()

mHandler.post(this::trackAvailableInterfaces);打开enable ethernet 接口

EthernetService/EthernetServiceImpl

EthernetTracker

setConfiguration()

  onProvisioningSuccess()ip分配成功，报告给ConnectivitySerivce

class NetworkInterfaceState in EthernetNetworkFactory.java

mTracker.start() 1. 读db2. 注册ethernet接口InterfaceObserver()用于监听接口变化3. 打开ethernet interface

startProvisioning()

IpClientManager.java

1. 系统启动时，系统会调用EthernetService.java 的onStart()函数，注册服务Context.ETHERNET_SERVICE到系统

mIpClient.startProvisioning(prov.toStableParcelable());

EthernetServiceImpl.java

Ethernet ip变化，frameworks 如何知道？

onStart()

IIpClient.aidl

创建对象EthernetTracker时1. 创建对象EthernetConfigStore2. 创建对象EthernetNetworkFactory

addInterface(ipConfiguration)

NetworkStack是app、是服务。TODO：流程

NetworkInterfaceState.setIpConfig(ipConfiguration);主要是在DHCP 与static mode切换时执行此函数

EthernetNetworkFactory

有线Ethernet切换DHCP与Static模式

  onIpLayerStarted()

maybeTrackInterface()

ConnectivityService服务。TODO：流程

AIDL: IpClient.aidl

mHandler.post(() -> mFactory.reconnectEthernet(iface));

network.start();

interfaceLinkStateChanged(false或true)

ethernet cable接入或拔掉跟踪代码入口

class EthernetNetworkFactory.IpClientCallbacksImpl

start();

mNetworkAgent.sendLinkProperties(linkProperties)

mConfigStore = new EthernetConfigStore();创建对象EthernetConfigStore 

EthernetService()

IpClient.java 位于：/packages/modules/NetworkStack/src/android/net/ip/IpClient.java

EthernetConfigStore.read();

NetworkStack进程

onLinkPropertiesChange()更新LinkProperties信息到ConnectivitySerivce