#include <stdio.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <sys/epoll.h>

#include <string.h>

#include <netinet/in.h>

#include "common.h"

#define LISTENQ 20

#define MAXEVENTS LISTENQ

int main(int argc,char *argv[])

{

int i,n;

int listenfd,connfd,epfd,nfds;

struct sockaddr_in servaddr,cliaddr;

struct epoll_event ev,events[MAXEVENTS];

bzero(&servaddr,sizeof(servaddr));

if((listenfd=socket(AF_INET,SOCK_STREAM,0))<0)

pr_exit("socket");

setnonblocking(listenfd);

servaddr.sin_family=AF_INET;

servaddr.sin_port=htons(PORT);

servaddr.sin_addr.s_addr=htonl(INADDR_ANY);

if(bind(listenfd,(struct sockaddr *)&servaddr,sizeof(servaddr))<0)

pr_exit("bind");

if(listen(listenfd,LISTENQ)<0)

pr_exit("listen");

epfd=epoll_create(MAXEVENTS);

ev.data.fd=listenfd;

ev.events=EPOLLIN|EPOLLET;

if(epoll_ctl(epfd,EPOLL_CTL_ADD,listenfd,&ev)<0)

pr_exit("epoll_ctl");

for( ; ; )

{

nfds=epoll_wait(epfd,events,MAXEVENTS,-1);

for(i=0;i<nfds;i++)

{

if(events[i].data.fd==listenfd)

{

socklen_t slen;

if((connfd=accept(listenfd,(struct sockaddr *)&cliaddr,

&slen))<0)

pr_exit("accept");

ev.data.fd=connfd;

ev.events=EPOLLIN|EPOLLET;

epoll_ctl(epfd,EPOLL_CTL_ADD,connfd,&ev);

}

if(events[i].events & EPOLLIN)

{

char buffer[MAXLINE];

bzero(&buffer,MAXLINE);

if((n=read(events[i].data.fd,buffer,MAXLINE))>0)

{

if(buffer[n-1]=='\n')

buffer[n-1]='\0';

printf("%s\n",buffer);

}

}

}

}

}