socket编程

Web服务器1-socket编程
time服务器的客户端服务器，提交程序运行截图
实验代码（部分）

client

typedef struct{
int rio_fd;
int rio_cnt;
char *rio_bufptr;
char rio_buf[RIO_BUFSIZE];

}rio_t;

define MAXLINE 200

int main(int argc,char **argv){

int clientfd,port;
char *host,buf[MAXLINE];
char sbuf[MAXLINE];
char rbuf[MAXLINE];
rio_t rio;
char str1[MAXLINE]="客户端IP:";
char str2[MAXLINE]="服务器实现者学号:20201205";

char str3[MAXLINE]="当地时间:";

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);

while(1){
    

    recv(clientfd,rbuf,MAXLINE,0);

    printf("%s",str1);
    puts(host);

    printf("%s",str2);
    putchar('\n');

    printf("%s",str3);
  
    puts(rbuf);
   
    close(clientfd);
   
    exit(0);
}

}

server

typedef struct{
int rio_fd;
int rio_cnt;
char *rio_bufptr;
char rio_buf[RIO_BUFSIZE];

}rio_t;

typedef struct sockaddr SA;

typedef struct{
int tm_sec;
int tm_min;
int tm_hour;
int tm_mday;
int tm_mon;
int tm_year;
int tm_wday;
int tm_yday;
int tm_isdst;
}tm;

void sigchld_handler(int sig){

    pid_t pid;
    int stat;

    while((pid = waitpid(-1,&stat,WNOHANG))>0){
        printf("child %d terminated\n",pid);
			        }
    return;

}

int main(int argc,char **argv){

    int listenfd,connfd,port,clientlen;
    struct sockaddr_in clientaddr;
    struct hostent *hp;
    char *haddrp;
    char sbuf[MAXLINE];
    char rbuf[MAXLINE];
    rio_t rio;
    time_t lt;
    tm *local;
    char str1[MAXLINE]="客户端IP:";
    char str2[MAXLINE]="服务器实现者学号:";
    char str3[MAXLINE]="当地时间:";

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){
    
 clientlen = sizeof(clientaddr);
 connfd = accept(listenfd,(SA *)&clientaddr,&clientlen);
 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)\n",hp->h_name,haddrp);
 if(fork() == 0){
 close(listenfd);
 lt = time(NULL); 
 local = localtime(&lt);
 strftime(sbuf,64,"%Y-%m-%d %H:%M:%S",local);
 send(connfd,sbuf,MAXLINE,0);
 close(connfd);
 exit(0);
    }

close(connfd);
}
}
运行截图：

echo服务器的客户端服务器，提交程序运行截图，服务器把客户端传进来的内容加入“服务器进程pid 你的学号 姓名 echo :”返回给客户端
运行截图：

服务器部署到华为云服务器，客户端用Ubuntu虚拟机。
client端

要用多线程或者多进程实现,至少连接两个客户端
两个客户端


server端