android - Wi-Fi 网络共享 - 如何获取已连接客户端的列表

Question

当我的手机处于 Wi-Fi 网络共享模式时，有什么方法可以获取连接的 MAC 地址列表？

Answer 1

首先，您必须有一个根设备。完成后，只需阅读dnsmasq.leases文件。通常它位于：/data/misc/dhcp/dnsmasq.leases。文件的结构非常简单——每一行都是连接用户的摘要。摘要有几个字段，包括 MAC。我没有找到没有 root 的可能获得 MAC。如果我错了，请纠正我。

Answer 2

读取/proc/net/arp将提供在过去 60 秒内与设备通信的静态和 DHCP 客户端的信息（配置在我手机上的无线网络接口的位置）/proc/sys/net/ipv4/neigh/wl0.1/gc_stale_time。wl0.1

它也适用于非 root 用户。

Answer 3

@SuppressWarnings("ConstantConditions")
public static String getClientMacByIP(String ip)
{
    String res = "";
    if (ip == null)
        return res;

    String flushCmd = "sh ip -s -s neigh flush all";
    Runtime runtime = Runtime.getRuntime();
    try
    {
        runtime.exec(flushCmd,null,new File("/proc/net"));
    }

    BufferedReader br;
    try
    {
        br = new BufferedReader(new FileReader("/proc/net/arp"));
        String line;
        while ((line = br.readLine()) != null)
        {
            String[] sp = line.split(" +");
            if (sp.length >= 4 && ip.equals(sp[0]))
            {Assistance.Log(sp[0]+sp[2]+sp[3],ALERT_STATES.ALERT_STATE_LOG);
                String mac = sp[3];
                if (mac.matches("..:..:..:..:..:..") && sp[2].equals("0x2"))
                {
                    res = mac;
                    break;
                }
            }
        }

        br.close();
    }
    catch (Exception e)
    {}

    return res;
}

//------------------------------------------------ --------

@SuppressWarnings("ConstantConditions")
public static String getClientIPByMac(String mac)
{
    String res = "";
    if (mac == null)
        return res;

    String flushCmd = "sh ip -s -s neigh flush all";
    Runtime runtime = Runtime.getRuntime();
    try
    {
        runtime.exec(flushCmd,null,new File("/proc/net"));
    }

    BufferedReader br;
    try
    {
        br = new BufferedReader(new FileReader("/proc/net/arp"));
        String line;
        while ((line = br.readLine()) != null)
        {
            String[] sp = line.split(" +");
            if (sp.length >= 4 && mac.equals(sp[3]))
            {
                String ip = sp[0];
                if (ip.matches("\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}") && sp[2].equals("0x2"))
                {
                    res = ip;
                    break;
                }
            }
        }

        br.close();
    }
    catch (Exception e)
    {}

    return res;
}

Answer 4

public static ArrayList<String> getConnectedDevicesMac()
{
    ArrayList<String> res = new ArrayList<String>();
    //NetManager.updateArpFile();

    BufferedReader br;
    try
    {
        br = new BufferedReader(new FileReader("/proc/net/arp"));
        String line;
        line = br.readLine();
        while ((line = br.readLine()) != null)
        {
            String[] sp = line.split(" +");
            if (sp[3].matches("..:..:..:..:..:.."))
                res.add(sp[3]);
        }

        br.close();
    }
    catch (Exception e)
    {}

    return res;
}