linux内核数据包的发送传输

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>

int main() {
    int sockfd;
    struct sockaddr_in servaddr;
    char *message = "Hello, World!";
    int len = strlen(message);

    // 创建套接字
    if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
        perror("socket creation failed");
        exit(EXIT_FAILURE);
    }

    memset(&servaddr, 0, sizeof(servaddr));

    // 配置服务器地址
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(8080);
    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");

    // 发送数据包
    if (sendto(sockfd, (const char *)message, len, MSG_CONFIRM, 
               (const struct sockaddr *) &servaddr, sizeof(servaddr)) < 0) {
        perror("sendto failed");
        exit(EXIT_FAILURE);
    }

    printf("Message sent successfully\n");

    close(sockfd);
    return 0;
}