#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/epoll.h>
#include <errno.h>
#include <netinet/in.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <iostream>
using namespace std;
#define LISTENQ 5
#define OPEN_MAX 1024
#define SERV_PORT 10088
#define MAX_LINE 1024
#define INFTIM -1
#define MAXEVENTS 1000
void echo_srv(int clientFd)
{
//處理用戶請求數據
char line[MAX_LINE];
cout << "開始讀取數據" << endl;
int n = read(clientFd, line, sizeof(line));
if(n < 0)
{
//#define ECONNRESET 104 /* Connection reset by peer */
if(errno == ECONNRESET)
{
close(clientFd);
printf("異常退出\n");
}
else
{
printf("網絡異常");
exit(-1);
}
}
else if(n == 0)
{
close(clientFd);
printf("正常退出\n");
}
else
{
line[n] = 0;
printf("接收到數據:%s\n", line);
write(clientFd, line, n);
}
}
int main(int argc, char** argv)
{
struct sockaddr_in cliaddr, servaddr;
int listenFd = socket(AF_INET, SOCK_STREAM, 0);
if( listenFd < 0)
{
printf("socket函數執行失敗");
return 1;
}
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
//inet_aton('10.132.10.64', &(servaddr.sin_addr));
//servaddr.sin_addr.s_addr = inet_addr("10.132.10.64");
servaddr.sin_port = htons(SERV_PORT);
if(bind(listenFd, (struct sockaddr*)&servaddr, sizeof(servaddr)) < 0)
{
printf("bind函數執行失敗");
return 1;
}
if(listen(listenFd, LISTENQ) < 0)
{
printf("listen函數執行失敗");
return 1;
}
printf("listen函數執行成功\n");
//epoll部分
int epollFd;
if ((epollFd = epoll_create(1)) == -1) {
cerr << "create epoll_create falid" << endl;
return false;
}
epoll_event epollEvent;
epollEvent.data.fd = listenFd;
epollEvent.events = EPOLLIN | EPOLLET;
if (epoll_ctl(epollFd, EPOLL_CTL_ADD, listenFd, &epollEvent) != 0)
{
cerr << "create epoll err!" << endl;
return 1;
}
cout << "create epoll ok!" << endl;
epoll_event *pEpollEvents = new epoll_event[MAXEVENTS];
while(true)
{
int n = epoll_wait(epollFd, pEpollEvents, MAXEVENTS, -1);
cout << "epoll wait conn" << endl;
for(int i = 0; i < n; i++)
{
epoll_event& e = pEpollEvents[i];
if((e.events & EPOLLERR) || (e.events & EPOLLHUP) || (!(e.events & EPOLLIN)))
{
cerr << "epoll error for client " << e.data.fd << endl;
close(e.data.fd);
}
else if(listenFd == e.data.fd) //處理用戶連接
{
socklen_t clilen = sizeof(cliaddr);
int connfd = accept(listenFd, (struct sockaddr*)&cliaddr, &clilen);
if(connfd < 0)
{
if ((errno != EAGAIN) && (errno != EWOULDBLOCK))
{
cerr << "fail to accept new client " << endl;
continue;
}
}
printf("Ip: %s 到此一遊\n", inet_ntoa(cliaddr.sin_addr));
//將用戶連接加入epoll中進行監視
e.data.fd = connfd;
e.events = EPOLLIN | EPOLLET;
if (epoll_ctl(epollFd, EPOLL_CTL_ADD, connfd, &e) != 0)
{
cerr << "create epoll err!" << endl;
continue;
}
}
else
{
echo_srv(e.data.fd);
}
}
}
}