實驗六_select服務器

1、實驗六 基于套接口復用的聊天室系統(tǒng)內容：建立一個容納63個客戶的聊天室。流程：1. 客戶端連接上聊天室服務器；2. 服務器把從一個客戶端收到的數據轉發(fā)給其它所有的客戶端；3. 客戶端顯示從服務器接收的數據服務器的流程如下BEGINWhile(1)把監(jiān)聽套接口和所有已連接套接口放入到查詢集合rset中;調用select()函數對rset中的套接口進行可讀性查詢;if(監(jiān)聽套接口有數據可讀)調用accept()函數來接受新客戶的連接;把新建立的已連接套接口放入到下一次查詢的rset中;對每一個（for each）有數據可讀的已連接套接口調用recv()函數來接收數據;if(客戶端斷開連接)把該套接

2、口從下一次查詢的rset中清除掉;跳轉到下一個有數據可讀的已連接套接口繼續(xù)處理(continue);把該套接口上接收到的數據，轉發(fā)給其它已連接套接口; / for each end/while(1) endEND客戶端的框架如下：/* 使用多線程的TCP聊天客戶端程序邏輯結構 */void _cdecl get_keyboard_input(void * param)SOCKET sock = (SOCKET) param;While(1)char info1024;gets(info);send(sock, info, strlen(info), 0);int main()SOCKET so

3、ck=socket();connect(sock,);_beginthread(get_keyboard_input, 0, (void *)sock); /啟動線程處理鍵盤輸入while(1)recv(sock, ); /主線程負責處理接收服務器的數據printf();要求：服務器的固定端口號為27015；TCP用套接口的復用來實現，有興趣的同學可以考慮實現基于UDP的程序；客戶端使用多線程來處理鍵盤的輸入和服務器數據的接收。服務器/ C1.cpp : 定義控制臺應用程序的入口點。/ C1.cpp : 定義控制臺應用程序的入口點。/#include stdafx.h#include#prag

4、ma comment(lib,ws2_32.lib)int _tmain(int argc, _TCHAR* argv)int i;WSADATA wsaData;int err = WSAStartup(MAKEWORD(2,2),&wsaData);if(0 != err)return -1;SOCKET sock;sock = socket(AF_INET,SOCK_STREAM,0);if(sock = INVALID_SOCKET)WSACleanup();return -1;sockaddr_in server;server.sin_family = AF_INET;server.

5、sin_port = htons(27015);server.sin_addr.s_addr=htonl(INADDR_ANY);if(bind(sock,(SOCKADDR*)&server,sizeof(server) = SOCKET_ERROR)closesocket(sock);WSACleanup();return -1;if(listen(sock,1) = SOCKET_ERROR)closesocket(sock);WSACleanup();return -1;#define MAXC 63SOCKET clientMAXC;for( i=0;iMAXC;i+)clienti

6、 = INVALID_SOCKET;fd_set rset,allset;FD_ZERO(&allset);FD_SET(sock,&allset);#define MAXS 1024char bufMAXCMAXS;for(;)rset = allset;int ret = select(0,&rset,NULL,NULL,NULL);if(ret = SOCKET_ERROR)break;if(ret = 0)continue;if(FD_ISSET(sock,&rset)struct sockaddr_in cliaddr;int clilen = sizeof(cliaddr);SOC

7、KET sockconn = accept(sock,(sockaddr *)&cliaddr,&clilen);if(sockconn = INVALID_SOCKET)break;for(i = 0; iMAXC; i+)if(clienti = INVALID_SOCKET)clienti = sockconn;break;if(iMAXC)FD_SET(sockconn,&allset);elseprintf(客戶端太多n);closesocket(sockconn);for(i=0; iMAXC; i+)if(clienti != INVALID_SOCKET)& FD_ISSET(

8、clienti,&rset)memset(bufi,0,MAXS);int nbyte = recv(clienti,bufi,sizeof(bufi),0);if(strcmp(bufi,) = 0)printf(client%d退出,i);elseprintf(client%d發(fā)送：%s,i,buf);if(nbyte = SOCKET_ERROR)FD_CLR(clienti,&allset);closesocket(clienti);clienti = INVALID_SOCKET;continue;if(nbyte = 0)FD_CLR(clienti,&allset);closes

9、ocket(clienti);clienti =INVALID_SOCKET;continue;send(clienti,bufi,sizeof(bufi),0);closesocket(sock);WSACleanup();return 0;客戶端/ S1.cpp : 定義控制臺應用程序的入口點。/#include stdafx.h#include #pragma comment(lib,ws2_32.lib)#include void _cdecl get_keyboard_input(void * param)SOCKET sock1 =(SOCKET)param;printf(輸入聊天

10、內容：n);while(1)char info1024; fgets(info, sizeof(info), stdin); send(sock1,info,strlen(info),0);memset(info,0,1024);int _tmain(int argc, _TCHAR* argv) SOCKET sock;WSADATA wsaData;if (WSAStartup(MAKEWORD(2,1),&wsaData) /調用Windows Sockets DL0printf(Winsock無法初始化!n);WSACleanup();return 0;char dest_ip=10.3.121.96;/本機的地址struct sockaddr_in server;server.sin_family=AF_INET;server.sin_port=htons(27015); /server的監(jiān)聽端口server.sin_addr.s_addr = inet_addr(dest_ip); sock=socket(AF_INET,SOCK_STREAM,0);int err = connect(sock,(sockaddr *)&server,sizeof(server);if(SOCKET_ERROR = err)printf(連接錯誤);_beginth