- 论坛徽章:
- 0
|
本帖最后由 senlin8350 于 2012-10-30 21:22 编辑
获取时间的简单程序:
客户端程序:
#include "unp.h"
#include <error.c>
int
main(int argc, char **argv)
{
int sockfd, n;
char recvline[MAXLINE + 1];
struct sockaddr_in servaddr;
if(argc != 2)
err_quit("usage: a.out<IPaddress>" ) ;
if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
err_sys("socket error");
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(13);
if(inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)
err_quit("inet errot for %s", argv[1] ) ;
if(connect(sockfd, (SA*)&servaddr, sizeof(servaddr)) < 0)
err_sys("connect error" ) ;
while((n = read(sockfd, recvline, MAXLINE)) > 0){
recvline[n] = 0;
if(fputs(recvline, stdout) == EOF)
err_sys("fputs, error" ) ;
}
if( n < 0)
err_sys("read error" ) ;
exit(0) ;
}
服务器端:
#include "unp.h"
#include <time.h>
int
main(void)
{
int listenfd, connfd;
socklen_t len;
struct sockaddr_in servaddr, cliaddr;
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, 15);
for(; ; ){
len = sizeof(cliaddr);
connfd = accept(listenfd, (SA*)&cliaddr, &len);
printf("connection from %s, port %d",
inet_ntop(AF_INET, &cliaddr.sin_addr, buff, sizeof(buff)),
ntohs(cliaddr.sin_port));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
write(connfd, buff, strlen(buff));
close(connfd);
}
}
编译后在本地运行程序,即做服务器又做客户端, 客户端输入自己的Ip地址。
运行客户端时显示:Connection refused. |
|