socket测试3

socket测试-3

基于socket 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

代码

点击查看代码

#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>\n", 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) 
    {
        time_t t;
        struct tm * lt;
        size_t n; 
        printf("\n客户端IP：127.0.0.1\n");
        printf("服务器实现者学号：20191315\n");
        time (&t);
        lt = localtime (&t);
        printf ("当前时间为：%d/%d/%d %d:%d:%d\n",lt->tm_year+1900, lt->tm_mon+1, lt->tm_mday, lt->tm_hour, lt->tm_min, lt->tm_sec);
        Rio_writen(clientfd, buf, strlen(buf));
        Rio_readlineb(&rio, buf, MAXLINE);
        Fputs(buf, stdout);
    }
    Close(clientfd); 
    exit(0);
}#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>\n", 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) 
    {
        time_t t;
        struct tm * lt;
        size_t n; 
        printf("\n客户端IP：127.0.0.1\n");
        printf("服务器实现者学号：20191315\n");
        time (&t);
        lt = localtime (&t);
        printf ("当前时间为：%d/%d/%d %d:%d:%d\n",lt->tm_year+1900, lt->tm_mon+1, lt->tm_mday, lt->tm_hour, lt->tm_min, lt->tm_sec);
        Rio_writen(clientfd, buf, strlen(buf));
        Rio_readlineb(&rio, buf, MAXLINE);
        Fputs(buf, stdout);
    }
    Close(clientfd); 
    exit(0);
}

点击查看代码

#include "csapp.h"

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("server received %d bytes\n", n);
        Rio_writen(connfd, buf, n);
    }
}

void sigchld_handler(int sig) 
{
    while (waitpid(-1, 0, WNOHANG) > 0);
    return;
}

int main(int argc, char **argv) 
{
    int listenfd, connfd, port, clientlen=sizeof(struct sockaddr_in);
    struct sockaddr_in clientaddr;
    if (argc != 2) 
    {
        fprintf(stderr, "usage: %s <port>\n", argv[0]);
        exit(0);
    }
    port = atoi(argv[1]);
    Signal(SIGCHLD, sigchld_handler);
    listenfd = Open_listenfd(port);
    while (1) {
    connfd = Accept(listenfd, (SA *) &clientaddr, &clientlen);
    if (Fork() == 0) 
    { 
        Close(listenfd); 
        echo(connfd); 
        Close(connfd); 
        exit(0);
    }
    Close(connfd); 
    }
}

截图