java ipv6 设置静态ip，前缀和网关合法性判断函数

以下是一个简单的 Java 代码示例，用于设置 IPv6 静态 IP、前缀和网关，并检查它们的合法性：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

public class IPv6Configurator {
    public static void main(String[] args) {
        String ipAddress = "2001:db8::1"; // 替换为你要设置的 IPv6 地址
        String prefix = "2001:db8::"; // 替换为你要设置的 IPv6 前缀
        String gateway = "fe80::1"; // 替换为你要设置的网关地址

        if (!isValidAddress(ipAddress)) {
            System.out.println("Invalid IP address: " + ipAddress);
            return;
        }

        if (!isValidPrefix(prefix)) {
            System.out.println("Invalid prefix: " + prefix);
            return;
        }

        if (!isValidAddress(gateway)) {
            System.out.println("Invalid gateway address: " + gateway);
            return;
        }

        try {
            NetworkInterface networkInterface = NetworkInterface.getByName("eth0"); // 替换为你的网络接口名称
            ProcessBuilder builder = new ProcessBuilder("sudo", "ifconfig", "eth0", "inet6", "add", ipAddress + "/64");
            builder.redirectErrorStream(true);
            Process process = builder.start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }

            builder = new ProcessBuilder("sudo", "route", "-A", "inet6", "add", "default", "gw", gateway, "eth0");
            builder.redirectErrorStream(true);
            process = builder.start();
            reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (SocketException | IOException e) {
            e.printStackTrace();
        }
    }

    public static boolean isValidAddress(String address) {
        try {
            InetAddress inetAddress = InetAddress.getByName(address);
            return inetAddress instanceof Inet6Address;
        } catch (Exception e) {
            return false;
        }
    }

    public static boolean isValidPrefix(String prefix) {
        try {
            NetworkInterface networkInterface = NetworkInterface.getByName("eth0"); // 替换为你的网络接口名称
            Enumeration<Inet6Address> inet6Addresses = networkInterface.getInet6Addresses();
            while (inet6Addresses.hasMoreElements()) {
                Inet6Address inet6Address = inet6Addresses.nextElement();
                if (inet6Address.getHostAddress().startsWith(prefix)) {
                    return true;
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
        return false;
    }
}

这个示例代码假设你的网络接口名称是 "eth0"，你可以根据自己的实际情况替换为正确的网络接口名称。它使用 Java 的 `NetworkInterface` 类获取网络接口的 IPv6 地址，并检查要设置的地址、前缀和网关是否合法。如果它们都合法，它将使用 `ifconfig` 和 `route` 命令设置静态 IP 和网关。请注意，这需要使用 `sudo` 权限运行该程序。

这个示例代码仅供参考，具体的实现方式可能因操作系统和网络配置而异。如果你遇到问题，请参考你的操作系统和网络设备的文档，或者咨询网络管理员。