linux socket客户端

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

int main() {
    int sockfd;
    struct sockaddr_in server_addr;
    char buffer[1024];

    // 创建socket
    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
        perror("socket");
        exit(1);
    }

    // 设置服务器地址
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(8080);
    inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr);

    // 连接服务器
    if (connect(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
        perror("connect");
        close(sockfd);
        exit(1);
    }

    // 发送数据
    strcpy(buffer, "Hello, Server!");
    send(sockfd, buffer, strlen(buffer), 0);

    // 接收数据
    memset(buffer, 0, sizeof(buffer));
    recv(sockfd, buffer, sizeof(buffer), 0);
    printf("Received: %s\n", buffer);

    // 关闭socket
    close(sockfd);
    return 0;
}