libevent客户端以及服务器

服务器端：

#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\n");}else if(event&BEV_EVENT_ERROR){printf("some other error\n");}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\n",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\n",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;}

客户端：

#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\n",msg);}void event_cb(struct bufferevent* bev,short event,void* arg){if(event&BEV_EVENT_EOF){printf("000connection closed\n");}else if(event& BEV_EVENT_ERROR){printf("some other error\n");}else if(event&BEV_EVENT_CONNECTED){printf("the client has connected to server\n");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\n");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\n");return 0;}