问题描述
- Linux 网络编程 epoll中的EPOLLIN EPOLLOUT如何触发
-
代码很长只截取关键部分
//服务器端
#include
#include
#include
#include
#include
#include
#include
#include
#include#include"locker.h"
#include"threadpool.h"
#include"http_conn.h"
#include"http_conn.cpp"
extern void addfd(int epollfd,int fd,bool one_shot);
extern void removefd(int epollfd,int fd);
#define MAX_FD 65536
#define MAX_EVENT_NUMBER 10000
void addsig(int sig,void(handler)(int),bool restart=true)
{
struct sigaction sa;
memset(&sa,'',sizeof(sa));
sa.sa_handler=handler;
if(restart)
{
sa.sa_flags|=SA_RESTART;
}
sigfillset(&sa.sa_mask);
assert(sigaction(sig,&sa,NULL)!=-1);
}void show_error(int connfd,const char* info)
{
printf("%s",info);
send(connfd,info,strlen(info),0);
close(connfd);
}
int main(int argc,char* argv[])
{
if(argc
{
printf("usage: %s ip_address port_number
",basename(argv[0]));
return 1;
}
const char* ip=argv[1];
int port=atoi(argv[2]);
addsig(SIGPIPE,SIG_IGN);
threadpool* pool=NULL;pool=new threadpool<http_conn>(3); http_conn* users=new http_conn[MAX_FD]; assert(users); int user_count=0; int listenfd=socket(PF_INET,SOCK_STREAM,0); assert(listenfd>=0); struct linger tmp={1,0}; setsockopt(listenfd,SOL_SOCKET,SO_LINGER,&tmp,sizeof(tmp)); int ret=0; struct sockaddr_in address; bzero(&address,sizeof(address)); address.sin_family=AF_INET; inet_pton(AF_INET,ip,&address.sin_addr); address.sin_port=htons(port); ret=bind(listenfd,(struct sockaddr*)&address,sizeof(address)); assert(ret>=0); ret=listen(listenfd,5); assert(ret>=0); epoll_event events[MAX_EVENT_NUMBER]; int epollfd=epoll_create(5); assert(epollfd!=-1); addfd(epollfd,listenfd,false); http_conn::m_epollfd=epollfd; while(1) { int number=epoll_wait(epollfd,events,MAX_EVENT_NUMBER,-1); printf("number is %d ",number); if((number<0)&&(errno!=EINTR)) { printf("epoll failure "); break; } for(int i=0;i<number;i++) { int sockfd=events[i].data.fd; if(sockfd==listenfd) { struct sockaddr_in client_address; socklen_t client_addrlength=sizeof(client_address); int connfd=accept(listenfd,(struct sockaddr*)&client_address,&client_addrlength); if(connfd<0) { printf("errno is: %d ",errno); continue; } if(http_conn::m_user_count>=MAX_FD) { show_error(connfd,"Internal sever busy"); continue; } printf("running the init(connfd,client_address)" ); users[connfd].init(connfd,client_address); } else if(events[i].events&(EPOLLRDHUP|EPOLLHUP|EPOLLERR)) { users[sockfd].close_conn(); } else if(events[i].events&EPOLLIN) { if(users[sockfd].read()) { pool->append(users+sockfd); } else { users[sockfd].close_conn(); } } else if(events[i].events&EPOLLOUT) { if(!users[sockfd].write()) { users[sockfd].close_conn(); } } } } close(epollfd); close(listenfd); delete [] users; delete pool; return 0;
}
以上是服务器端的主程序 思路是epoll_wait接收到连接就为连接创建一个users存储然后等待后续的操作 但后面EPOLLIN 和EPOLLOUT永远都没法触发 不清楚该怎么触发 另一端写了服务器压力测试程序 和以上代码类似 就是循环创建socket对象然后connect()服务器 但我本意想两端互相发送数据 可connect()后服务器收到创建一个user 继续循环等待 但压力测试程序也在创建完对象后陷入循环等待服务器端的操作 请问该如何触发EPOLLIN和EPOLLOUT信号
以下是压力测试程序关键代码
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
static const char* request = "GET http://localhost/index.html HTTP/1.1
Connection: keep-alivexxxxxxxxxx";
int setnonblocking(int fd)
{
int old_option=fcntl(fd,F_GETFL);
int new_option=old_option|O_NONBLOCK;
fcntl(fd,F_SETFL,new_option);
return old_option;
}
void addfd(int epollfd,int fd)
{
epoll_event event;
event.data.fd=fd;
event.events=EPOLLIN|EPOLLET|EPOLLRDHUP;
epoll_ctl(epollfd,EPOLL_CTL_ADD,fd,&event);
setnonblocking(fd);
}bool write_nbytes(int sockfd,const char* buffer,int len)
{
int byters_write=0;
printf("write out %d bytes to socket %d
",len,sockfd);
while(1)
{
bytes_write=send(sockfd,buffer,len,0);
if(bytes_write==-1)
{
return false;
}
else if(bytes_write==0)
{
return false;
}
len-=bytes_write;
buffer=buffer+bytes_write;
if(len<=0)
{
return true;
}
}
}bool read_once(int sockfd,char* buffer,int len)
{
int bytes_read=0;
memset(buffer,'',len);
bytes_read=recv(sockfd,buffer,len,0);
if(bytes_read==-1)
{
return false;
}
else if(bytes_read==0)
{
return false;
}
printf("read in %d bytes from socket %d with content: %s
",bytes_read,sockfd,buffer);
return true;
}
void start_conn(int epoll_fd,int num,const char* ip,int port)
{
int ret=0;
struct sockaddr_in address;
bzero(&address,sizeof(address));
address.sin_family=AF_INET;
inet_pton(AF_INET,ip,&address.sin_addr);
address.sin_port=htons(port);for(int i=0;i<num;++i) { sllep(1); int sockfd=socket(PF_INET,SOCK_STREAM,0); printf("create 1 sock "); if(sockfd<0) { continue; } if(connect(sockfd,(struct sockaddr*)&address,sizeof(address))==0) { printf("build connection %d ",i); addfd(epoll_fd,sockfd); } }
}
void close_conn(int epoll_fd,int sockfd)
{
epoll_ctl(epoll_fd,EPOLL_CTL_DEL,sockfd,0);
close(sockfd);
}int main(int argc,char* argv[])
{
assert(argc==4);
int epoll_fd=epoll_create(100);
start_conn(epoll_fd,atoi(argv[3]),argv[1],atoi(argv[2]));
epoll_event events[10000];
char buffer[2048];while(1) { int fds=epoll_wait(epoll_fd,events,10000,2000); for(int i=0;i<fds;i++) { int sockfd=events[i].data.fd; if(event[i].events&EPOLLIN) { if(!read_once(sockfd,buffer,2048)); { close_conn(epoll_fd,sockfd); } struct epoll_event event; event.events=EPOLLOUT|EPOLLET|EPOLLERR; event.data.fd=sockfd; epoll_ctl(epoll_fd,EPOLL_CTL_MOD,sockfd,&event); } else if(events[i].events&EPOLLOUT) { if(!write_nbytes(sockfd,request,strlen(request))) { close_conn(epoll_fd,sockfd); } struct epoll_event event; event.events=EPOLLIN|EPOLLET|EPOLLERR; event.data.fd=sockfd; epoll_ctl(epoll_fd,EPOLL_CTL_MOD,sockfd,&event); } else if(events[i].events&EPOLLERR) { close_conn(epoll_fd,sockfd); } } }
}
解决方案
linux 网络编程 epoll
linux网络编程之 epoll
Linux网络编程之epoll
解决方案二:
你的得先注册事件监听啊。把要监控的套接字和要监听的事件注册