/*该文件实现服务器的监听
*
*
*
*/
#include<stdio.h>
#include<sys/epoll.h>
#include<sys/socket.h>
#include<errno.h>
#include<string.h>
#include<iostream>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<stdlib.h>
#include<fcntl.h>
#include<list>
using namespace std;
const int maxn = 1e2+10;
int port=80;
char host[maxn]="localhost";
list<int> clientList;
void setAddr(struct sockaddr_in &addr,char *host,int port){
addr.sin_family=AF_INET;
addr.sin_port=htons(port); //转换成网络序（大端）
addr.sin_addr.s_addr=inet_addr("127.0.0.1");
}
void perr(const char *s){
perror(s);
exit(-1);
}
void setnonblocking(int sockfd){
fcntl(sockfd,F_SETFL,fcntl(sockfd,F_GETFD,0)|O_NONBLOCK);
return;
}
int sendBroadMessage(int nowfd){ //收到信息先接收信息 ，然后再发给list里面的所有
char message[1024];
bzero(message,sizeof(message));
int len=recv(nowfd,message,1024,0);
if(len==0){ //客户端关闭了链接
close(nowfd);
clientList.remove(nowfd);
printf("关闭了一个链接");
}
else{
list<int>::iterator it;
int cnt=0;
for(it=clientList.begin();it!=clientList.end();it++){
if(send(*it,message,1024,0)<0){
printf("%d\n",*it);
perror("send error");
}
else{
printf("%d\n发送成功",*it);
}
}
}
return len;
}
void addfd(int epollfd,int fd,bool flag){// flag用来设置水平还是垂直
struct epoll_event ev;
ev.data.fd=fd;
ev.events=EPOLLIN;
if(flag){ //设置水平触发
ev.events|=EPOLLET;
}
epoll_ctl(epollfd,EPOLL_CTL_ADD,fd,&ev);
setnonblocking(fd);
printf("fd added to epoll!\n\n");
return;
}
int main(){
int sta=0;
int sock=socket(AF_INET,SOCK_STREAM,0);
if(sock<0) perr("socket出错");
struct sockaddr_in serverAddr,clientAddr;
bzero(&serverAddr,sizeof(serverAddr));
bzero(&clientAddr,sizeof(clientAddr));
setAddr(serverAddr,host,port);
// sta=listen(sock,5);
// if(sta<0) perr("listen");
if(bind(sock,(struct sockaddr*)&serverAddr,sizeof(serverAddr))<0) perr("bind");
sta=listen(sock,5);
if(sta<0) perr("listen");
socklen_t addrLength = sizeof(struct sockaddr_in);
static struct epoll_event events[1024];
int epfd=epoll_create(1); //这个参数大于0就行，没啥用
addfd(epfd,sock,true);
while(true){
int epollEventCnt=epoll_wait(epfd,events,1024,-1);
//这里感觉不应该设置成阻塞
if(epollEventCnt<0) perr("epollWait");
printf("epollCnt:%d\n",epollEventCnt);
for(int i=0;i<epollEventCnt;i++){
int now=events[i].data.fd;
if(now==sock){ //监听的得到了信息
struct sockaddr_in cli;
socklen_t cliLen=sizeof(cli);
int newfd=accept(sock,(struct sockaddr*)&cli,&cliLen);
printf("From:%s:%d\n",inet_ntoa(cli.sin_addr),ntohs(cli.sin_port));
addfd(epfd,newfd,true); //这里服务器只设置读入权限
clientList.push_back(newfd);
printf("%d描述符添加\n",newfd);
char message[1024]="Welcome to tellHouse!\n";
sta=send(newfd,message,1024,0);
if(sta<0) perr("send error");
}
else{
//别的链接来消息了，这个消息要发给所有的链接。
sta=sendBroadMessage(now);
if(sta<0) perr("运行出错");
}
}
}
close(epfd);
close(sock);
return 0;
}
Mas este código não é testado (número porta do servidor não facilitou as coisas), haverá código de cliente de comunicações em tempo real de acompanhamento.
