因为这学期要交winsocket的通信程序,一个字,坑。因为上课就没有教的。不过有神器在手,陆楠同学的《计算机网络实训和编程》,so,还不是手到擒来!
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环境:win7+vs2010
项目:C++项目,有预编译头文件
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先看效果:
服务端:
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客户端:
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连接后:
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不过感觉怪怪的。
?看看client的源文件:
class="cpp">// TCPEx_Client.cpp : 定义控制台应用程序的入口点。 // #include "stdafx.h" #include <winsock2.h> #include <iostream> #pragma comment(lib, "ws2_32.lib") using namespace std; int _tmain(int argc, _TCHAR* argv[]) { const int DEFAULT_PORT = 5000; WORD wVersionRequested; WSADATA wsaData; int err,iLen; if (argc < 2) { cout<<"Command:TcpEx_Client ServerIP"<<endl; return 0; } wVersionRequested=MAKEWORD( 2, 2 ); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { cout<<"加载WinSock失败!"; return 0; } SOCKET sockClient = socket(AF_INET,SOCK_STREAM,0); //创建用于连接的套接字 if (sockClient == INVALID_SOCKET) { cout<<"socket() fail:"<<WSAGetLastError()<<endl; return 0; } SOCKADDR_IN addrSrv; addrSrv.sin_family = AF_INET; addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); addrSrv.sin_port = htons(DEFAULT_PORT); err = connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));//请求连接服务器进程 if ( err == INVALID_SOCKET ) { cout<<"connect() fail:"<<WSAGetLastError()<<endl; return 0; } char sendBuf[1024],hostname[100]; if (gethostname(hostname,100) != 0) strcpy_s(hostname,"None"); //获取主机名称 strcpy_s(sendBuf,hostname); strcat_s(sendBuf," have conneted to you!"); err = send(sockClient,sendBuf,int(strlen(sendBuf))+1,0); //发送数据 if (err == SOCKET_ERROR) { cout<<"send() fail:"<<WSAGetLastError()<<endl; return 0; } char recvBuf[1024]; iLen = recv(sockClient,recvBuf,1024,0); //接收数据 if (iLen == 0) return 0; else if (iLen == SOCKET_ERROR) { cout<<"recv() fail:"<<WSAGetLastError()<<endl; return 0; } else { recvBuf[iLen] = '\0'; cout<<recvBuf<<endl; } closesocket(sockClient); //关闭套接字 WSACleanup(); }
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再看Sever:
// TCPSrvEx.cpp : 定义控制台应用程序的入口点。 // #include "stdafx.h" #include <winsock2.h> #include <iostream> #include <string.h> using namespace std; #pragma comment(lib, "ws2_32.lib") int _tmain(int argc, _TCHAR* argv[]) { const int DEFAULT_PORT = 5000; WORD wVersionRequested; WSADATA wsaData; int err,iLen; wVersionRequested=MAKEWORD( 2, 2 ); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { cout<<"加载WinSock失败!"; return 0; } SOCKET sockSrv = socket(AF_INET,SOCK_STREAM,0); //创建服务器监听套接字 if (sockSrv == INVALID_SOCKET) { cout<<"socket() fail:"<<WSAGetLastError()<<endl; return 0; } SOCKADDR_IN addrSrv; addrSrv.sin_family = AF_INET; addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);//自动分配地址,字节顺序转换 addrSrv.sin_port = htons(DEFAULT_PORT);//字节顺序转换 err = bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); //绑定本地主机IP和端口 if ( err != 0 ) { cout<<"bind() fail:"<<WSAGetLastError()<<endl; return 0; } err = listen(sockSrv,5); //监听 if ( err != 0 ) { cout<<"listen() fail:"<<WSAGetLastError()<<endl; return 0; } cout<<"Server waiting...:"<<endl; SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); while(1) { SOCKET sockConn = accept(sockSrv,(SOCKADDR*)&addrClient,&len);//接收客户连接请求 if (sockConn == INVALID_SOCKET) { cout<<"accept() fail:"<<WSAGetLastError()<<endl; break; } char sendBuf[1024],hostname[100]; if (gethostname(hostname,100) != 0) //获取主机名称 strcpy_s(hostname,"None"); sprintf_s(sendBuf,"welcome %s connected to %s!",inet_ntoa(addrClient.sin_addr),hostname); err = send(sockConn,sendBuf,int(strlen(sendBuf))+1,0); //发送数据 if (err == SOCKET_ERROR) { cout<<"send() fail:"<<WSAGetLastError()<<endl; break; } char recvBuf[1024] = "\0"; iLen = recv(sockConn,recvBuf,1024,0);//接收数据 if (iLen == SOCKET_ERROR) { cout<<"recv() fail:"<<WSAGetLastError()<<endl; break; } recvBuf[iLen] = '\0'; cout<<recvBuf<<endl; closesocket(sockConn); //关闭套接字 } closesocket(sockSrv);//关闭服务器监听套接字 WSACleanup(); return 0; }
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好吧,其实我只是把书本上的例子实现了一遍。
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看看老师给的例子:
client:
// Client.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include<WINSOCK2.H> #include<iostream.h> #include <stdio.h> #pragma comment(lib,"ws2_32.lib") void main(int argc, char* argv[]) { SOCKET sock ; SOCKADDR_IN dest_sin ; WSADATA wsaData ;//版本参数 int port = 344 ; if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) { cout<<"WinSock startup Error!" ; return ; } sock = socket(AF_INET, SOCK_STREAM, 0) ; if (sock == INVALID_SOCKET) { cout<<"socket() failed" ; closesocket(sock) ; return ; } dest_sin.sin_family = AF_INET ; dest_sin.sin_port = htons(port) ; dest_sin.sin_addr.s_addr = inet_addr("127.0.0.1") ; connect(sock, (sockaddr *)&dest_sin, sizeof(dest_sin)) ; ////连续发十个数给服务器 char szName[20] ; for(int i=0 ; i<20 ; i++) { sprintf(szName, " %d", i) ; send(sock, szName, 20, 0) ; } // send(sock, " ",0,0) ; closesocket(sock) ; if (WSACleanup() == SOCKET_ERROR) { cout<<"WSACleanup() failed with error "<<WSAGetLastError() ; } }
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Sever:
// Server.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include<WINSOCK2.H> #include<iostream.h> #pragma comment(lib,"ws2_32.lib") void main(int argc, char* argv[]) { SOCKET sockServer ; SOCKET sockAccept ; SOCKADDR_IN local_sin ; SOCKADDR_IN acc_sin ; WSADATA wsaData ; int port = 344 ; if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) { cout<<"WinSock startup Error!" ; return ; } sockServer = socket(AF_INET, SOCK_STREAM, 0) ; if (sockServer == INVALID_SOCKET) { cout<<"socket() failed" ; closesocket(sockServer) ; return ; } local_sin.sin_port = htons(port) ; local_sin.sin_family = AF_INET ; local_sin.sin_addr.s_addr = INADDR_ANY ; if (bind(sockServer, (sockaddr FAR*)&local_sin, sizeof(local_sin)) == SOCKET_ERROR) { cout<<"bind(sock) failed "<<WSAGetLastError()<<"is the error!" ; return ; } cout<<"Server begin..."<<endl ; if (listen(sockServer, 4)) { cout<<"listen(sockserver) failed "<<WSAGetLastError()<<" is the error!" ; return ; } int acc_sin_len = sizeof(acc_sin) ; sockAccept = accept(sockServer, (sockaddr FAR*)&acc_sin, (int FAR*)&acc_sin_len) ; if (sockAccept<0) { cout<<"accept() failed "<<WSAGetLastError()<<" is the error!" ; return ; } char szName[20] ; ////////////////////////////////////////////////////////////////////////// //等待接收数据 while (1) { int rec = recv(sockAccept, szName, 20, 0) ; if( rec == 0) { cout<<"Server stop.."<<endl ; break ; } else cout<<szName<<endl ; } closesocket(sockServer) ; closesocket(sockAccept) ; if (WSACleanup() == SOCKET_ERROR) { cout<<"WSACleanup() failed with error "<<WSAGetLastError() ; } }
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