Theta/test.c
2019-11-05 12:51:44 +01:00

144 lines
3.5 KiB
C

//
// Készítette: Toldi Balázs Ádám
// Dátum: 2019. 10. 11..
//
//#include <ws2tcpip.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <fcntl.h>
#define PORT 8888
#define MAX_LINE 2048
#define LISTENQ 20
int main(int argc , char **argv)
{
int i, maxi, maxfd, listenfd, connfd, sockfd;
int nready , client[FD_SETSIZE];
ssize_t n, ret;
fd_set rset , allset;
char buf[MAX_LINE];
socklen_t clilen;
struct sockaddr_in servaddr , cliaddr;
/*(1) 得到监听描述符*/
listenfd = socket(AF_INET , SOCK_STREAM , 0);
/*(2) 绑定套接字*/
bzero(&servaddr , sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(PORT);
bind(listenfd , (struct sockaddr *)&servaddr , sizeof(servaddr));
/*(3) 监听*/
listen(listenfd , LISTENQ);
/*(4) 设置select*/
maxfd = listenfd;
maxi = -1;
for(i=0 ; i<FD_SETSIZE ; ++i)
{
client[i] = -1;
}//for
FD_ZERO(&allset);
FD_SET(listenfd , &allset);
/*(5) 进入服务器接收请求死循环*/
while(1)
{
rset = allset;
nready = select(maxfd+1 , &rset , NULL , NULL , NULL);
if(FD_ISSET(listenfd , &rset))
{
/*接收客户端的请求*/
clilen = sizeof(cliaddr);
printf("\naccpet connection~\n");
if((connfd = accept(listenfd , (struct sockaddr *)&cliaddr , &clilen)) < 0)
{
perror("accept error.\n");
exit(1);
}//if
char buf[4096];
read(connfd,buf,4096);
printf("%s",buf);
printf("accpet a new client: %s:%d\n", inet_ntoa(cliaddr.sin_addr) , cliaddr.sin_port);
/*将客户链接套接字描述符添加到数组*/
for(i=0 ; i<FD_SETSIZE ; ++i)
{
if(client[i] < 0)
{
client[i] = connfd;
break;
}//if
}//for
if(FD_SETSIZE == i)
{
perror("too many connection.\n");
exit(1);
}//if
FD_SET(connfd , &allset);
if(connfd > maxfd)
maxfd = connfd;
if(i > maxi)
maxi = i;
if(--nready < 0)
continue;
}//if
for(i=0; i<=maxi ; ++i)
{
if((sockfd = client[i]) < 0)
continue;
if(FD_ISSET(sockfd , &rset))
{
/*处理客户请求*/
printf("\nreading the socket~~~ \n");
bzero(buf , MAX_LINE);
if((n = read(sockfd , buf , MAX_LINE)) <= 0)
{
close(sockfd);
FD_CLR(sockfd , &allset);
client[i] = -1;
}//if
else{
printf("clint[%d] send message: %s\n", i , buf);
if((ret = write(sockfd , buf , n)) != n)
{
printf("error writing to the sockfd!\n");
break;
}//if
}//else
if(--nready <= 0)
break;
}//if
}//for
}//while
}