android4.0 經過DHCP方式實現以太網鏈接

    前段時間作了個廠家測試程序，中間有涉及到網口的檢測。基於android4.0的以太網DHCP或者設置靜態Ip來實現網絡鏈接，主要實現過程以下：

一。DHCP動態獲取ip實現網絡鏈接

1.註冊網絡狀態變化的廣播接收：

private void registerEthernet() {
    IntentFilter ethFilter = new IntentFilter(EthernetManager.ETHERNET_STATE_CHANGED_ACTION);
    ethFilter.addAction(EthernetManager.NETWORK_STATE_CHANGED_ACTION);
    registerReceiver(mEthConnectReceiver, ethFilter);
}

private BroadcastReceiver mEthConnectReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        Log.d(TAG, " Ethernet onRecevice action = " + action);
        if (action.equals(EthernetManager.ETHERNET_STATE_CHANGED_ACTION)) {
            int msg = intent.getIntExtra(EthernetManager.EXTRA_ETHERNET_STATE, -1);
            switch (msg) {
            case EthernetDataTracker.EVENT_DHCP_CONNECT_FAILED:
                break;
            case EthernetDataTracker.EVENT_DHCP_DISCONNECT_FAILED:
                break;
            case EthernetDataTracker.EVENT_STATIC_CONNECT_FAILED:
                break;
            case EthernetDataTracker.EVENT_STATIC_DISCONNECT_FAILED:
                break;
            case EthernetDataTracker.EVENT_DHCP_CONNECT_SUCCESSED:
                pingEthGateway(getEthGateWay());//ping命令DHCP鏈接網絡是否成功
                break;
            case EthernetDataTracker.EVENT_DHCP_DISCONNECT_SUCCESSED:
                break;
            case EthernetDataTracker.EVENT_STATIC_CONNECT_SUCCESSED:
                pingEthGateway(getEthGateWay());//ping命令測試靜態IP鏈接網絡是否成功
                break;
            case EthernetDataTracker.EVENT_STATIC_DISCONNECT_SUCCESSED:
                break;
            case EthernetDataTracker.EVENT_PHY_LINK_UP:
                setDhcp();//網線插上後本身進行DHCP
                break;
            case EthernetDataTracker.EVENT_PHY_LINK_DOWN:
                Log.d(TAG, "EVENT_PHY_LINK_DOWN ");//網線拔出
                break;
            default:
                break;
            }
        }
    }
};

2.經過DHCP實現網絡鏈接

private String dhcp_gateway = null;
private String wifi_gateway = null;
private EthernetManager mEthManager = null;
private WifiManager mWifiManager = null;
private ConnectivityManager mConnectivityManager = null;

public void getInstance(Context context) {
        mEthManager = (EthernetManager) context.getSystemService(Context.ETHERNET_SERVICE);
        mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
        mConnectivityManager = (ConnectivityManager) context
				.getSystemService(Context.CONNECTIVITY_SERVICE);
}
public void setDhcp() {
	mWifiManager.setWifiEnabled(false);//斷開WIFI的鏈接
	mEthManager.setEthernetEnabled(false);
	Log.i(TAG, "getEthernetState=" + mEthManager.getEthernetState());
	mEthManager.setEthernetDefaultConf();
	mEthManager.setInterfaceName("eth0");
	mEthManager.setEthernetEnabled(true);
	Log.i(TAG, "getEthernetState=" + mEthManager.getEthernetState());
}

3.獲取IP信息：

public String getEthGateWay() {
	String ip = mConnectivityManager.getLinkProperties(ConnectivityManager.TYPE_ETHERNET)
			.getAddresses().toString();
	String mGW = mConnectivityManager.getLinkProperties(ConnectivityManager.TYPE_ETHERNET)
				.getRoutes().toString();
	String mDns = mConnectivityManager.getLinkProperties(ConnectivityManager.TYPE_ETHERNET)
				.getDnses().toString();
	Log.i(TAG, "getEthGateWay ip=" + ip);
	Log.i(TAG, "getEthGateWay mGW=" + mGW);
	Log.i(TAG, "getEthGateWay mDns=" + mDns);
	if (mGW.contains(">")) {
		mGW = mGW.substring(mGW.lastIndexOf('>') + 2, mGW.length() - 1);
	}
	dhcp_gateway = mGW;
	return mGW;
}

其中獲取的Ip信息爲：

    getEthGateWay ip=[/192.168.1.102]
    getEthGateWay mGW=[0.0.0.0/0 -> 192.168.1.1]
    getEthGateWay mDns=[/192.168.10.247, /192.168.1.1]

所以須要對網關信息進行處理。

4.Ping命令測試IP地址:

   使用Root權限，經過JNI封裝成一個系統庫，調用exe command進行ping -c 4 -w 100 192.168.1.1測試。代碼將不詳細貼出。

    執行結果：

    I/SystemTestingJNI( 1836): executeCommand ret=0, result=PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
    I/SystemTestingJNI( 1836): 64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=6.54 ms
    I/SystemTestingJNI( 1836): 64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.316 ms
    I/SystemTestingJNI( 1836): 64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.194 ms    
    I/SystemTestingJNI( 1836): 64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=0.255 ms
    I/SystemTestingJNI( 1836): 
    I/SystemTestingJNI( 1836): --- 192.168.1.1 ping statistics ---
    I/SystemTestingJNI( 1836): 4 packets transmitted, 4 received, 0% packet loss, time 3001ms
    I/SystemTestingJNI( 1836): rtt min/avg/max/mdev = 0.194/1.826/6.542/2.723 ms

  --還有一種方法，使用Runtime去ping,可是須要注意權限問題，以及輸入輸出流得本身處理。 exec執行時阻塞、非阻塞，返回結果問題

    Process p= Runtime.getRuntime().exec(cmd);//String cmd

-------------------------------------------------------------------------------------------------------------------

二。經過設置靜態IP鏈接網絡：

public static void setStaticIp() {
	mWifiManager.setWifiEnabled(false);
	mEthManager.setEthernetEnabled(false);
	DhcpInfoInternal mDhcpInfoInternal = new DhcpInfoInternal();
	InetAddress iRoute = NetworkUtils.numericToInetAddress("192.168.1.103");
	InetAddress iNetmask = NetworkUtils.numericToInetAddress("255.255.255.0");
	try {
		int netmask = NetworkUtils.inetAddressToInt(iNetmask);
		int prefixLength = NetworkUtils.netmaskIntToPrefixLength(netmask);
		mDhcpInfoInternal.prefixLength = prefixLength;
	} catch (IllegalArgumentException e) {
		e.printStackTrace();
	}
	mDhcpInfoInternal.ipAddress = "192.168.1.103";
	mDhcpInfoInternal.addRoute(new RouteInfo(iRoute));
	mDhcpInfoInternal.dns1 = "192.168.10.248";
	mDhcpInfoInternal.serverAddress = "255.255.255.0";

	mEthManager.saveEthernetIpInfo(mDhcpInfoInternal.makeDhcpInfo(),
				EthernetManager.ETHERNET_CONNECT_MODE_MANUAL);
	mEthManager.setEthernetEnabled(true);
	DhcpInfo dhcpInfo = mEthManager.getSavedEthernetIpInfo();
	dhcp_gateway = Formatter.formatIpAddress(dhcpInfo.gateway);
}

----經過網口實現網絡鏈接實現，就此Ending。。------

DHCP詳細代碼：http://www.oschina.net/code/snippet_1051613_26563

配置工程中須要引用framework.jar,services.jar。

配置方法：

       取到out\target\common\obj\JAVA_LIBRARIES\framework_intermediates\class.jar，而後放到本地，右擊工程進入java build path ,經過add Library--user library ---添加剛取到的class.jar,取名爲framewrok.最後調整Java build path 中的order and Export 將framework一直up到第一個。

     取到out\target\common\obj\JAVA_LIBRARIES\services_intermediates\class.jar。方法同framework.

     環境配置好後，從新Build。就不會有紅叉叉了！！

WIFI文章：WIFI，熱點掃描，配對，以及IP的獲取。

http://my.oschina.net/hiliusl/blog/175605