Linux socket网络编程之聊天室(三):select异步通讯实现
来源:互联网 发布:美林数据java开发岗 编辑:程序博客网 时间:2024/05/16 17:56
1.服务器端
- /*select_server*/
- #include <stdio.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <string.h>
- #include <sys/types.h>
- #include <netinet/in.h>
- #include <sys/socket.h>
- #include <sys/wait.h>
- #include <pthread.h>
- #include <sys/wait.h>
- #include <sys/time.h>
- #include <arpa/inet.h>
- #include <unistd.h>
- #define MAXBUF 1024
- int main(int argc,char **argv){
- int sockfd,new_fd;
- socklen_t len;
- struct sockaddr_in my_addr,their_addr;
- unsigned int myport,lisnum;
- char buf[MAXBUF+1];
- fd_set rfds;
- struct timeval tv;
- int retval,maxfd = -1;
- if(argv[1]){
- myport = atoi(argv[1]);
- }
- else
- myport = 7838;
- if(argv[2]){
- lisnum = atoi(argv[2]);
- }
- else
- lisnum =2;
- if((sockfd = socket(PF_INET,SOCK_STREAM,0))== -1){
- perror("socket");
- exit(1);
- }
- bzero(&my_addr,sizeof(my_addr));
- my_addr.sin_family = PF_INET;
- my_addr.sin_port = htons(myport);
- if(argv[3])
- my_addr.sin_addr.s_addr = INADDR_ANY;
- if(bind(sockfd,(struct sockaddr *)&my_addr,sizeof(struct sockaddr)) == -1){
- perror("bind");
- exit(1);
- }
- if(listen(sockfd, lisnum) == -1){
- perror("listen");
- exit(1);
- }
- while(1){
- printf("\n----waiting for new connecting to start new char----\n");
- len = sizeof(struct sockaddr);
- if((new_fd = accept(sockfd,(struct sockaddr *)&their_addr,&len)) == -1){
- perror("accept");
- exit(errno);
- }
- else
- printf("server:got connection from %s,port %d,socked %d\n",\
- inet_ntoa(their_addr.sin_addr),\
- ntohs(their_addr.sin_port),new_fd);
- /*开始处理每个新连接上的数据收发*/
- //printf("\n---ready to go.now you can chatting...input enter,then you can chat---\n");
- while(1){
- /*把集合清空*/
- FD_ZERO(&rfds);
- /*把标准输入句柄0加入到集合中*/
- FD_SET(0,&rfds);
- maxfd = 0;
- /*把当前连接句柄new_fd加入到集合中*/
- FD_SET(new_fd,&rfds);
- if(new_fd > maxfd)
- maxfd = new_fd;
- /*设置最大等待时间*/
- tv.tv_sec = 1;
- tv.tv_usec = 0;
- retval = select(maxfd+1,&rfds,NULL,NULL,&tv);
- if(retval == -1){
- printf("select error!%s\n",strerror(errno));
- break;
- }
- else if(retval == 0){
- //printf("no message come,user no press the button,please wait...\n");
- continue;
- }
- else{
- if(FD_ISSET(new_fd,&rfds)){
- /*连接的socket 上有消息则接收并显示*/
- bzero(buf,MAXBUF+1);
- /*接收对方发过来的消息,最多MAXBUF字节*/
- len = recv(new_fd, buf, MAXBUF, 0);
- if(len > 0)
- printf("recv msg success:%s! %d bytes rcv.\n ",buf,len);
- else{
- if(len < 0){
- printf("recv msg fail.the errno is:%d,error info is %s.\n",errno,strerror(errno));
- }
- else
- printf("quit.\n");
- break;
- }
- }// FD_ISSET = sockfd情况
- if(FD_ISSET(0,&rfds)){
- /*用户有输入了,则读取其内容并发送*/
- bzero(buf, MAXBUF+1);
- fgets(buf, MAXBUF, stdin);
- if(!strncasecmp(buf, "quit", 4)){
- printf("self request to quit the chating\n");
- break;
- }
- /*发消息给服务器*/
- len = send(new_fd, buf, strlen(buf)-1 , 0);
- if(len < 0){
- printf("mgs:%s send fail!errno is:%d,error info is:%s\n", buf, errno, strerror(errno));
- break;
- }else{
- printf("msg: %s\t send success, send %d bytes!\n", buf, len);
- }
- }//FD_ISSET = 0
- }//select 处理结束
- }/*内while*/
- close(new_fd);
- /*处理每个新连接上的数据收发结束*/
- printf("would you want to chatting with another one?(no->quit)");
- fflush(stdout);
- bzero(buf,MAXBUF+1);
- fgets(buf,MAXBUF,stdin);
- if(!strncasecmp(buf,"no",2)){
- printf("quit the chatting!\n");
- break;
- }
- }/*外while*/
- close(sockfd);
- return 0;
- }
2.客户端
- /*select_client.c 2011.9.2 by yyg*/
- #include <stdio.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <string.h>
- #include <sys/types.h>
- #include <netinet/in.h>
- #include <sys/socket.h>
- #include <sys/wait.h>
- #include <pthread.h>
- #include <sys/time.h>
- #include <arpa/inet.h>
- #include <unistd.h>
- #include <resolv.h>
- #define MAXBUF 1024
- int main(int argc,char **argv){
- int sockfd,len;
- struct sockaddr_in dest;
- char buffer[MAXBUF+1];
- fd_set rfds;
- struct timeval tv;
- int retval,maxfd = -1;
- if(argc != 3){
- printf("the param style wrong!\n");
- exit(0);
- }
- /*创建一个socket用于tcp通信*/
- if((sockfd = socket(AF_INET,SOCK_STREAM,0)) < 0){
- perror("socket");
- exit(errno);
- }
- /*初始化服务器端(对方)的地址和端口信息*/
- bzero(&dest,sizeof(dest));
- dest.sin_family = AF_INET;
- dest.sin_port = htons(atoi(argv[2]));
- if(inet_aton(argv[1],(struct in_addr *)&dest.sin_addr.s_addr) == 0){
- perror(argv[1]);
- exit(errno);
- }
- /*conect to the server*/
- if(connect(sockfd,(struct sockaddr*)&dest,sizeof(dest)) !=0){
- perror("connect");
- exit(errno);
- }
- printf("\n---ready to chatting...---\n");
- while(1){
- /*把集合清空*/
- FD_ZERO(&rfds);
- /*把标准输入句柄0加入到集合中*/
- FD_SET(0,&rfds);
- maxfd = 0;
- /*把当前连接句柄socket 加入到集合中*/
- FD_SET(sockfd,&rfds);
- if(sockfd > maxfd)
- maxfd = sockfd;
- /*设置最大等待时间*/
- tv.tv_sec = 1;
- tv.tv_usec = 0;
- /*开始等待*/
- retval = select(maxfd+1,&rfds,NULL,NULL,&tv);
- if(retval == -1){
- printf("select error,quit!\n");
- break;
- }else if(retval == 0){
- continue;
- }else{
- if(FD_ISSET(sockfd,&rfds)){
- /*连接的socket 上有消息则接收并显示*/
- bzero(buffer,MAXBUF+1);
- /*接收对方发过来的消息,最多MAXBUF字节*/
- len = recv(sockfd, buffer, MAXBUF, 0);
- if(len > 0)
- printf("recv msg success:%s! %d bytes rcv.\n ",buffer,len);
- else{
- if(len < 0){
- printf("recv msg fail.the errno is:%d,error info is %s.\n",errno,strerror(errno));
- }
- else
- printf("quit.\n");
- break;
- }
- }// FD_ISSET = sockfd情况
- if(FD_ISSET(0,&rfds)){
- /*用户有输入了,则读取其内容并发送*/
- bzero(buffer, MAXBUF+1);
- fgets(buffer, MAXBUF, stdin);
- if(!strncasecmp(buffer, "quit", 4)){
- printf("self request to quit the chating\n");
- break;
- }
- /*发消息给服务器*/
- len = send(sockfd, buffer, strlen(buffer)-1 , 0);
- if(len < 0){
- printf("mgs:%s send fail!errno is:%d,error info is:%s\n", buffer, errno, strerror(errno));
- break;
- }else{
- printf("msg: %s\t send success, send %d bytes!\n", buffer, len);
- }
- }//FD_ISSET = 0
- }//select 处理结束
- }//处理聊天的while 循环
- /*关闭连接*/
- close(sockfd);
- return 0;
- }
运行结果:
终端1:服务器端
- [root@localhost net]# ./select_server 7838
- ----waiting for new connecting to start new char----
- server:got connection from 172.31.100.236,port 59462,socked 4
- recv msg success:kfldsjfk! 8 bytes rcv.
- 456354
- msg: 456354
- send success, send 6 bytes!
- recv msg success:453455! 6 bytes rcv.
终端2:客户端
- [root@localhost net]# ./select_client 172.31.100.236 7838
- ---ready to chatting...---
- kfldsjfk
- msg: kfldsjfk
- send success, send 8 bytes!
- recv msg success:456354! 6 bytes rcv.
- 453455
- msg: 453455
- send success, send 6 bytes!
- Linux socket网络编程之聊天室(三):select异步通讯实现
- Linux socket网络编程之聊天室(三):select异步通讯实现
- Linux socket网络编程之聊天室(三):select异步通讯实现
- Linux网络编程用select实现异步通讯聊天程序
- SOCKET网络编程:Linux下实现聊天室
- linux异步socket编程之select()用法
- Linux网络编程一步一步学-异步通讯聊天程序select
- Linux网络编程一步一步学-异步通讯聊天程序select
- Linux网络编程一步一步学-异步通讯聊天程序select
- Linux网络编程一步一步学-异步通讯聊天程序select
- java socket编程之聊天室(三)
- socket用select实现异步通讯
- Linux 网络编程之socket、select
- linux socket网络编程之select
- Android网络编程之Socket通信实现简单聊天室
- 【网络编程】之七、select聊天室
- 【网络编程】之七、select聊天室
- linux c++ socket 网络编程(2) select 异步非阻塞
- OpenGL 中常用的 GLUT 函数库
- php常用函数
- Tetris2
- Oracle数据库日常维护手册
- GLSurfaceView中添加button并监听click事件
- Linux socket网络编程之聊天室(三):select异步通讯实现
- C Looooops&&http://poj.org/problem?id=2115
- xcode 4 适配 iphone 3
- Oracle查询优化
- Apache错误:LoadModule takes two arguments, a module name and the name of a shared object
- 用cookie实现localstorage功能
- 创建android中使用的openssl静态库
- 在windows下运行Felzenszwalb的Discriminatively Trained Deformable Part Models matlab代码
- 感悟自然-人生