课上测试

课上测试

测试要求

基于socket 使用教材的csapp.h csapp.c,实现daytime(13)服务器（端口我们使用13+后三位学号）和客户端
服务器响应消息格式是
“
客户端IP：XXXX
服务器实现者学号：XXXXXXXX
当前时间： XX：XX：XX
”
上方提交代码
提交一个客户端至少查询三次时间的截图测试截图
提交至少两个客户端查询时间的截图测试截图

实验代码

srever.c

#include <stdio.h>
#include <stdlib.h>
#include "csapp.h"
#include <time.h>
void echo(int connfd);
int main(int argc, char **argv) 
{
    int listenfd, connfd, port, clientlen;
    struct sockaddr_in clientaddr;
    struct hostent *hp;
    char *haddrp;
    if (argc != 2) {
    fprintf(stderr, "usage: %s <port>
", argv[0]);
    exit(0);
    }
    port = atoi(argv[1]);
    listenfd = Open_listenfd(port);
    while (1) {
    clientlen = sizeof(clientaddr);
    connfd = Accept(listenfd, (SA *)&clientaddr, &clientlen);
    /* determine the domain name and IP address of the client */
    hp = Gethostbyaddr((const char *)&clientaddr.sin_addr.s_addr, 
               sizeof(clientaddr.sin_addr.s_addr), AF_INET);
    haddrp = inet_ntoa(clientaddr.sin_addr);
    printf("server connected to %s (%s)
", hp->h_name, haddrp);
    echo(connfd);
    Close(connfd);
    }
    exit(0);
}
void echo(int connfd)
{
    size_t n;
    char buf[MAXLINE];
    rio_t rio;
    
    Rio_readinitb(&rio, connfd);
    while((n = Rio_readlineb(&rio, buf, MAXLINE)) != 0) {
        printf("客户端IP:127.0.0.1
");
        printf("服务器实现学号:20175310
");
        printf("server received %d bytes
", n);
        time_t t;
        time(&t);
        printf("当前时间:%s
",ctime(&t));
        Rio_writen(connfd, buf, n);
    }
}

client.c

#include "csapp.h"
int main(int argc, char **argv)
{
    int clientfd, port;
    char *host, buf[MAXLINE];
    rio_t rio;
    if (argc != 3) {
        fprintf(stderr, "usage: %s <host> <port>
", argv[0]);
        exit(0);
    }
    host = argv[1];
    port = atoi(argv[2]);
    clientfd = Open_clientfd(host, port);
    Rio_readinitb(&rio, clientfd);
    while (Fgets(buf, MAXLINE, stdin) != NULL) {
        Rio_writen(clientfd, buf, strlen(buf));
        Rio_readlineb(&rio, buf, MAXLINE);
        Fputs(buf, stdout);
    }
    Close(clientfd);
    exit(0);
}

实验截图：