/** function comment
 * @Author: 陈逸凡 1343619937@qq.com
 * @Date: 2024-04-17 15:29:56
 * @LastEditors: 陈逸凡 1343619937@qq.com
 * @LastEditTime: 2024-04-18 16:25:48
 * @FilePath: \telnet\telnet_client.c
 * @Description: 这是默认设置,请设置`customMade`, 打开koroFileHeader查看配置 进行设置: https://github.com/OBKoro1/koro1FileHeader/wiki/%E9%85%8D%E7%BD%AE
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>

#define BUFFER_SIZE 1024
#define SERVER_IP "127.0.0.1"
#define SERVER_PORT 23

int main()
{
    int sockfd;
    struct sockaddr_in server_addr;
    char buffer[BUFFER_SIZE];
    ssize_t bytes_read;

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

    // 设置服务器地址结构
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(SERVER_PORT);
    server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);

    // 连接到服务器
    if (connect(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1)
    {
        perror("connection failed");
        exit(EXIT_FAILURE);
    }
    printf(" connect success\n");
    while (1)
    {
        // 接收数据
        bytes_read = recv(sockfd, buffer, BUFFER_SIZE - 1, 0);
        if (bytes_read == -1)
        {
            perror("recv failed");
            exit(EXIT_FAILURE);
        }

        for (int i = 0; i <bytes_read ; i++)
        {
            printf("%d ", buffer[i]);
        }
        
    }

    // 关闭socket
    close(sockfd);

    return 0;
}