daytimetcpsrv.c

这是一个linux下时间通信的server端和client端的源码,下载后分别保存

/* daytimetcpsrv.c */
#define MAXLINE 4096
#define LISTENQ 1024
#define SA struct sockaddr

#include "curses.h"
#include "stdlib.h"
#include "stdio.h"
#include "errno.h"
#include "netdb.h"
#include "string.h"
#include "sys/time.h"
#include "sys/types.h"
#include "sys/socket.h"
#include "netinet/in.h"
#include "memory.h"

/* Define bzero() as a macro if it's not in standard C library. */
#ifndef HAVE_BRZEO 
#define bzero(ptr,n) memset(ptr,0,n) 
#endif

int main(int argc,char * * argv)
{
	int listenfd,connfd;
	struct sockaddr_in servaddr;
	char buff[MAXLINE];
	time_t ticks;
	listenfd = socket(AF_INET,SOCK_STREAM,0);
	bzero(&servaddr,sizeof(servaddr));
	servaddr.sin_family = AF_INET;
	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
	servaddr.sin_port = htons(13);
	bind(listenfd,(SA *)&servaddr,sizeof(servaddr));
	listen(listenfd,LISTENQ);
	for(;;){
		connfd = accept(listenfd,(SA *)NULL,NULL);
		ticks = time(NULL);
		snprintf(buff,sizeof(buff),"%.24s\r\n",ctime(&ticks));
		write(connfd,buff,strlen(buff));
		close(connfd);
	}
}