libevent 클라이언트 및 서버

#include<stdio.h>
#include<string.h>
#include<errno.h>
#include<unistd.h>
#include<event.h>
#include<event2/bufferevent.h>
#include<event2/listener.h>
#include<event2/thread.h>

void socket_read_cb(bufferevent* bev,void* arg)
{
	char msg[4096];

	int len=bufferevent_read(bev,msg,sizeof(msg)-1);
	msg[len]='\0';
	printf("recv the client msg:%s",msg);
	char reply_msg[4096]="I have recvieced the msg:";
	strcat(reply_msg+strlen(reply_msg),msg);
	bufferevent_write(bev,reply_msg,strlen(reply_msg));
}

void socket_event_cb(struct bufferevent* bev,short event,void* arg)
{
	if(event&BEV_EVENT_EOF)
	{
		printf("connection closed
");
	}
	else if(event&BEV_EVENT_ERROR)
	{
		printf("some other error
");
	}
	bufferevent_free(bev);
}

/*void accept_cb(int fd,short events,void* arg)
{
	evutil_socket_t sockfd;
	struct sockaddr_in client;
	socklen_t len=sizeof(client);
	sockfd=accept(fd,(struct sockaddr*)&client,&len);
	evutil_make_socket_nonblocking(sockfd);
	printf("accept a client %d
",sockfd);
	struct event_base* base=(event_base*)arg;
	//struct event* ev=event_new(NULL,-1,0,NULL,NULL);
	//event_assign(ev,base,sockfd,EV_READ|EV_PERSIST,socket_read_cb,(void*)ev);
	//event_add(ev,NULL);
	bufferevent* bev=bufferevent_socket_new(base,sockfd,BEV_OPT_CLOSE_ON_FREE);
	bufferevent_setcb(bev,socket_read_cb,NULL,event_cb,arg);
	bufferevent_enable(bev,EV_READ|EV_PERSIST);
}


int tcp_server_init(int port,int listen_num)
{
	int errno_save;
	evutil_socket_t listener;
	listener=socket(AF_INET,SOCK_STREAM,0);
	if(listener==-1)
	{
		return -1;
	}
	evutil_make_listen_socket_reuseable(listener);
	struct sockaddr_in sin;
	sin.sin_family=AF_INET;
	sin.sin_addr.s_addr=0;
	sin.sin_port=htons(port);
	if(bind(listener,(struct sockaddr*)&sin,sizeof(sin))<0)
	{
		goto error;
	}
	if(listen(listener,listen_num)<0)
	{
		goto error;
	}
	evutil_make_socket_nonblocking(listener);
	return listener;
	error:
		errno_save=errno;
		evutil_closesocket(listener);
		errno=errno_save;
		return -1;
}*/
void listener_cb(evconnlistener* listener,evutil_socket_t fd,struct sockaddr* sock,int socklen,void* arg)
{
	printf("accept a client %d
",fd);
	event_base* base=(event_base*)arg;
	bufferevent* bev=bufferevent_socket_new(base,fd,BEV_OPT_CLOSE_ON_FREE);
	bufferevent_setcb(bev,socket_read_cb,NULL,socket_event_cb,NULL);
	bufferevent_enable(bev,EV_READ|EV_PERSIST);
}

int main(int argc,char* argv[])
{
	struct sockaddr_in sin;
	memset(&sin,0,sizeof(sin));
	sin.sin_family=AF_INET;
	sin.sin_addr.s_addr=0;
	sin.sin_port=htons(8888);
	struct event_base* base=event_base_new();
	evconnlistener* listener=evconnlistener_new_bind(base,listener_cb,base,LEV_OPT_REUSEABLE|LEV_OPT_CLOSE_ON_FREE,10,(struct sockaddr*)&sin,sizeof(sin));

	event_base_dispatch(base);
	evconnlistener_free(listener);
	event_base_free(base);
	return 0;
}

#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<errno.h>
#include<unistd.h>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<event.h>
#include<event2/bufferevent.h>
#include<event2/buffer.h>
#include<event2/util.h>
void cmd_msg_cb(int fd,short events,void* arg)
{
	char msg[1024];
	int ret=read(fd,msg,sizeof(msg));
	if(ret<=0)
	{
		perror("read fail");
		exit(1);
	}
	struct bufferevent* bev=(struct bufferevent*)arg;
	bufferevent_write(bev,msg,ret);
}
void server_msg_cb(struct bufferevent*  bev,void* arg)
{
	char msg[1024];
	int len=bufferevent_read(bev,msg,sizeof(msg));
	msg[len]='\0';
	printf("recv %s from server
",msg);
}
void event_cb(struct bufferevent* bev,short event,void* arg)
{
	if(event&BEV_EVENT_EOF)
	{
		printf("000connection closed
");
	}
	else if(event& BEV_EVENT_ERROR)
	{
		printf("some other error
");
	}
	else if(event&BEV_EVENT_CONNECTED)
	{
		printf("the client has connected to server
");
		return;
	}
	bufferevent_free(bev);
	struct event* ev=(struct event*)arg;
	event_free(ev);
}
/*int tcp_connect_server(const char* server_ip,int port)
{
	int sockfd,status,save_errno;
	struct sockaddr_in server_addr;
	memset(&server_addr,0,sizeof(server_addr));
	server_addr.sin_family=AF_INET;
	server_addr.sin_port=htons(port);
	status=inet_aton(server_ip,&server_addr.sin_addr);
	if(status==0)
	{
		errno=EINVAL;
		return -1;
	}
	sockfd=socket(AF_INET,SOCK_STREAM,0);
	if(sockfd==-1)
	{
		return -1;
	}
	status=connect(sockfd,(struct sockaddr*)&server_addr,sizeof(server_addr));
	if(status==-1)
	{
		save_errno=errno;
		close(sockfd);
		errno=save_errno;
		return -1;
	}
	evutil_make_socket_nonblocking(sockfd);
	return sockfd;
}*/
int main(int argc,char* argv[])
{
	if(argc<3)
	{
		printf("please input 2 parameters
");
		return -1;
	}

	struct event_base* base=event_base_new();
	//struct event* ev_sockfd=event_new(base,sockfd,EV_READ|EV_PERSIST,socket_read_cb,NULL);
	//event_add(ev_sockfd,NULL);
	struct bufferevent* bev=bufferevent_socket_new(base,-1,BEV_OPT_CLOSE_ON_FREE);

	struct event* ev_cmd=event_new(base,STDIN_FILENO,EV_READ|EV_PERSIST,cmd_msg_cb,(void*)bev);
	event_add(ev_cmd,NULL);
	struct sockaddr_in server_addr;
	memset(&server_addr,0,sizeof(server_addr));
	server_addr.sin_family=AF_INET;
	server_addr.sin_port=htons(atoi(argv[2]));
	inet_aton(argv[1],&server_addr.sin_addr);
	bufferevent_socket_connect(bev,(struct sockaddr*)&server_addr,sizeof(server_addr));

	bufferevent_setcb(bev,server_msg_cb,NULL,event_cb,(void*)ev_cmd);
	bufferevent_enable(bev,EV_READ|EV_PERSIST);
	event_base_dispatch(base);
	printf("finished
");
	return 0;
}