Android获取热点提供设备的IP地址

时间:2013-06-25 16:06:16

标签: android networking ip android-wifi wifimanager

我正在使用

public static String getLocalIPAddress(WifiManager wm){
    return Formatter.formatIpAddress(wm.getConnectionInfo().getIpAddress());
}

获取执行设备的IP地址。如果设备连接到“公共”wlan网络,并且设备连接到由其他Android设备通过热点托管的wifi网络,则工作正常。如果设备未连接到任何wifi网络,则返回“0.0.0.0”(正确)。但是,如果设备通过提供热点来托管wifi网络,则该方法仍然返回“0.0.0.0”。如何在“自己的wifi网络”中获取热点提供设备的真实IP地址?

thx&问候

6 个答案:

答案 0 :(得分:24)

你几乎是对的,热点的默认IP地址是192.168.43.1(如果设备制造商没有改变。)

您可以查看Android框架(AOSP)的源代码。

/frameworks/base/services/java/com/android/server/connectivity/Tethering.java /frameworks/base/wifi/java/android/net/wifi/WifiStateMachine.java

在Tethering.java中,

private static final String USB_NEAR_IFACE_ADDR      = "192.168.42.129";
private static final int USB_PREFIX_LENGTH        = 24;

// USB is  192.168.42.1 and 255.255.255.0
// Wifi is 192.168.43.1 and 255.255.255.0
// BT is limited to max default of 5 connections. 192.168.44.1 to 192.168.48.1
// with 255.255.255.0

private String[] mDhcpRange;
private static final String[] DHCP_DEFAULT_RANGE = {
    "192.168.42.2", "192.168.42.254", "192.168.43.2", "192.168.43.254",
    "192.168.44.2", "192.168.44.254", "192.168.45.2", "192.168.45.254",
    "192.168.46.2", "192.168.46.254", "192.168.47.2", "192.168.47.254",
    "192.168.48.2", "192.168.48.254",
};

另外,在WifiStateMachine.java

private boolean startTethering(ArrayList<String> available) {                                 

    boolean wifiAvailable = false;                                                            

    checkAndSetConnectivityInstance();                                                        

    String[] wifiRegexs = mCm.getTetherableWifiRegexs();                                      

    for (String intf : available) {                                                           
        for (String regex : wifiRegexs) {                                                     
            if (intf.matches(regex)) {                                                        

                InterfaceConfiguration ifcg = null;                                           
                try {                                                                         
                    ifcg = mNwService.getInterfaceConfig(intf);                               
                    if (ifcg != null) {                                                       
                        /* IP/netmask: 192.168.43.1/255.255.255.0 */                          
                        ifcg.setLinkAddress(new LinkAddress(                                  
                                NetworkUtils.numericToInetAddress("192.168.43.1"), 24));      
                        ifcg.setInterfaceUp();                                                

                        mNwService.setInterfaceConfig(intf, ifcg);                            
                    }                                                                         
                } catch (Exception e) {                                                       
                    loge("Error configuring interface " + intf + ", :" + e);                  
                    return false;                                                             
                }                                                                             

                if(mCm.tether(intf) != ConnectivityManager.TETHER_ERROR_NO_ERROR) {           
                    loge("Error tethering on " + intf);                                       
                    return false;                                                             
                }                                                                             
                mTetherInterfaceName = intf;                                                  
                return true;                                                                  
            }                                                                                 
        }                                                                                     
    }                                                                                         
    // We found no interfaces to tether                                                       
    return false;                                                                             
}   

因此,默认值为192.168.43.1

答案 1 :(得分:12)

我测试了一小部分不同的设备,似乎热点提供设备在其网络上始终具有IP 192.168.43.1。有人可以检查/确认这个假设吗?

答案 2 :(得分:5)

Hotspot可能充当DHCP服务器。所以,

  

连接到远程(客户端)后调用wifi方法获取wifi热点的IP地址(服务器)

<script type="text/javascript">
    $("#userform").submit(function(e) {
e.preventDefault();
    var url = $(this).attr('action');
var formData = new FormData($(this)[0]);
    $.ajax({
           type: "POST",
           url: url,
           data:  formData, 
            processData: false,
        dataType: 'json',
           success: function(data)
           {
            console.log(data);
             $('#message').html(data.message);                     
           }
         });
});
</script>

然后

intToInetAddress(wifiManager.getDhcpInfo().serverAddress);// get hotspot ip

将返回已连接热点的IP地址,是的,热点的大多数默认IP地址为192.168.43.1

答案 3 :(得分:2)

尽管这是一个古老的问题,但这可能会对某人有所帮助。只要您打开了热点,它就会返回设备的IP地址。

private String getIpAddress() {
    String ip = "";
    try {
        Enumeration<NetworkInterface> enumNetworkInterfaces = NetworkInterface
                .getNetworkInterfaces();
        while (enumNetworkInterfaces.hasMoreElements()) {
            NetworkInterface networkInterface = enumNetworkInterfaces
                    .nextElement();
            Enumeration<InetAddress> enumInetAddress = networkInterface
                    .getInetAddresses();
            while (enumInetAddress.hasMoreElements()) {
                InetAddress inetAddress = enumInetAddress.nextElement();

                if (inetAddress.isSiteLocalAddress()) {
                    ip += "SiteLocalAddress: "
                            + inetAddress.getHostAddress() + "\n";
                }
            }
        }

    } catch (SocketException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        ip += "Something Wrong! " + e.toString() + "\n";
    }
    return ip;
}

答案 4 :(得分:0)

我还检查了几个设备,所有设备的IP地址均为192.168.43.1 你可以试试这个地址 但在android pie中变成了192.168.43.68

答案 5 :(得分:0)

打开termux并运行

pkg install net-tools
ifconfig -a | grep 192.168.43.

您会得到的:

        inet 192.168.43.248  netmask 255.255.255.0  broadcast 192.168.43.255