IP首部 在16进制下解析《IP首部都能解析可还是解析不了你的心》

package bag31;

import java.util.Scanner;

/**
 * @ClassName iPAndTcp
 * @Author Mr.W
 * @Date 2024/9/29
 * Description :
 * God Bless My Code
 */
public class iPAndTcp {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        String[] dataAll = new String[32];
        for (int i = 0; i < 20; i++) {
            dataAll[i] = scanner.next();
        }

        System.out.print("IP vision：");
        System.out.println(Integer.parseInt(String.valueOf(dataAll[0].charAt(0)), 16));
        System.out.print("IP head：");
        String substring = dataAll[0].substring(1);
        System.out.println(Integer.parseInt(substring, 16) + "* 4B");
        System.out.print("all：");
        System.out.println(Integer.parseInt(String.valueOf(dataAll[2] + dataAll[3]), 16) + "* 2B ");
        System.out.print("sig ：");
        String result = Integer.toBinaryString(Integer.parseInt(String.valueOf(dataAll[6].charAt(0)), 16));
        if (result.length() < 4)
            result = "0" + result;
        System.out.println("DF :" + result.charAt(1) + " MF :" + result.charAt(2) + "  ");
        if (result.charAt(1) == '1') {
            System.out.println("fragmentation is Permitted");
        } else System.out.print("fragmentation is Prohibited ");

        if (result.charAt(2) == '1') {
            System.out.println("fragmentations");
        } else System.out.println("no more fragmentation");
        String s = result.charAt(3) + dataAll[7];
        System.out.print("fragment offset ：");
        System.out.println(Integer.parseInt(String.valueOf(s), 16) + " * 8B");
        System.out.print("TTL : ");
        System.out.println(Integer.parseInt(String.valueOf(dataAll[8]), 16));
        System.out.print("protocol : ");
        System.out.println(Integer.parseInt(String.valueOf(dataAll[9]), 16));
        System.out.println("From IP :");
        System.out.println( Integer.parseInt(String.valueOf(dataAll[12]), 16) +"."+ Integer.parseInt(String.valueOf(dataAll[13]), 16)+"."+ Integer.parseInt(String.valueOf(dataAll[14]), 16)+"."+ Integer.parseInt(String.valueOf(dataAll[15]), 16));
        System.out.println("To IP :");
        System.out.println( Integer.parseInt(String.valueOf(dataAll[16]), 16) +"."+ Integer.parseInt(String.valueOf(dataAll[17]), 16)+"."+ Integer.parseInt(String.valueOf(dataAll[18]), 16)+"."+ Integer.parseInt(String.valueOf(dataAll[19]), 16));


    }


}