通过套接字发送 C 字符数组

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

#define SERVER_IP "目标主机IP"
#define SERVER_PORT 目标主机端口号

int main() {
    int sockfd;
    struct sockaddr_in server_addr;
    char message[] = "Hello, World!";

    // 创建套接字
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) {
        perror("Failed to create socket");
        exit(EXIT_FAILURE);
    }

    // 设置目标主机信息
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
    server_addr.sin_port = htons(SERVER_PORT);

    // 连接目标主机
    if (connect(sockfd, (struct sockaddr*)&server_addr, sizeof(server_addr)) < 0) {
        perror("Failed to connect to server");
        exit(EXIT_FAILURE);
    }

    // 发送数据
    if (send(sockfd, message, strlen(message), 0) < 0) {
        perror("Failed to send data");
        exit(EXIT_FAILURE);
    }

    printf("Data sent successfully\n");

    // 关闭套接字
    close(sockfd);

    return 0;
}