天津理工网络实验二卫晓彤

实验报告学院（系）名称：计算机与通信工程学院姓名卫晓彤学号20091995专业计算机科学与技术班级09-2班实验项目基于TCP/UDP的Socket编程课程名称计算机网络课程代码0662016实验时间2012年3月15日2012年 3月20日实验地点7-219批改意见成绩教师签字：实验目的： a) 利用Java或C+语言，分别基于TCP和UDP编写一个简单的Client/Server网络应用程序。要求实现客户向服务器传输任意一个字符串，服务器将收到的字符串变换成大写后传回客户。b) 修改上述程序，实现服务器根据客户请求，将服务器端指定的文件可靠地传输给客户。如果服务器没有指定的文件，服务器将给客户返回一个信息，通知客户其请求文件不存在。c) 有条件的同学可以进一步改进b)的程序，使之更实用。比如可以请求服务器先传输目录，然后客户根据目录请求传输文件等。实验要求：每位同学上机编程实验，实验指导教师现场指导。程序可参考附录的程序1、程序2、程序3和程序4（程序中有错误需完善）实验结果：1.传字符串、聊天附：源代码！Server：#include #include #include void main()WORD wVersionRequested;WSADATA wsaData;int err;wVersionRequested = MAKEWORD( 1, 1 );err = WSAStartup( wVersionRequested, &wsaData );if ( err != 0 ) return;if ( LOBYTE( wsaData.wVersion ) != 1 | HIBYTE( wsaData.wVersion ) != 1 ) WSACleanup( );return; SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);SOCKADDR_IN addrSrv;addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);addrSrv.sin_family=AF_INET;addrSrv.sin_port=htons(6000);bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR);listen(sockSrv,5); /第2个?参?数y为a等待y队列D得?最?大长度SOCKADDR_IN addrClient;int len=sizeof(SOCKADDR);while(1)SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);char sendBuf100;sprintf(sendBuf,Sent successfully!,inet_ntoa(addrClient.sin_addr);send(sockConn,sendBuf,strlen(sendBuf)+1,0);char recvBuf100;recv(sockConn,recvBuf,100,0);time_t timep;time (&timep);printf(%s ,inet_ntoa(addrClient.sin_addr);printf(%s,ctime(&timep);printf(%sn,recvBuf);closesocket(sockConn);Client：#include #include #include #include void fun(char * msn)WORD wVersionRequested;WSADATA wsaData;int err;wVersionRequested = MAKEWORD( 1, 1 );err = WSAStartup( wVersionRequested, &wsaData );if ( err != 0 ) return;if ( LOBYTE( wsaData.wVersion ) != 1 | HIBYTE( wsaData.wVersion ) != 1 ) WSACleanup( );return; SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);SOCKADDR_IN addrSrv;addrSrv.sin_addr.S_un.S_addr=inet_addr(127.0.0.1);addrSrv.sin_family=AF_INET;addrSrv.sin_port=htons(6000);connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR);char recvBuf100;recv(sockClient,recvBuf,100,0);printf(%sn,recvBuf); time_t timep; time (&timep); printf(%s,ctime(&timep);send(sockClient,msn,strlen(msn)+1,0);closesocket(sockClient);WSACleanup();getchar();void main()char msn100;for(;)scanf(%s,msn);if(strcmp(msn,0)=0)break;fun(msn);2.传文件附源码：/server.cpp#include #include #include #include #define LISTENPORT 12345#pragma comment(lib,Wsock32)#pragma comment(lib,ws2_32)sendFile(SOCKET conSock) printf(Prapare to send filen); char *sendBuf = new char100; FILE *in; char infile50; printf(Input filename:n); scanf(%s,infile); if(in=fopen(infile,rb)=NULL) printf(Cant open the source file); exit(0); printf(File name is %sn, infile); / send file name to the client send(conSock, infile, sizeof(infile), 0); int handle = open(infile, 0x0001); long file_len = filelength(handle); long file_len_bak = file_len; printf(Size of the file is %dn, file_len); / store the length of the file in sendBuffer int i; for (i = 0; file_len 9; i+) sendBufi = (file_len % 10); file_len = file_len / 10; sendBufi = file_len % 10; send(conSock, sendBuf, i + 1, 0); printf(Transmission startedn); Sleep(1); char ch; char chack; while (file_len_bak != 0) ch = fgetc(in); send(conSock, &ch, 1, 0); recv(conSock, &chack, 1, 0); file_len_bak-; printf(.); ch = EOF; send(conSock, &ch, 1, 0); printf(nTransmission finished);int main() WSADATA words; if(WSAStartup(MAKEWORD(2,2),&words)!=0) printf(Winsock init failed!n); SOCKET listenSock, conSock; sockaddr_in remoteAddr; int remoteAddrLen, int ServerAddrLen; listenSock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (listenSock = INVALID_SOCKET) printf(ListenSocket create failed!n); return 0; sockaddr_in sin; sin.sin_family = AF_INET; sin.sin_port = htons(LISTENPORT); sin.sin_addr.S_un.S_addr = INADDR_ANY; ServerAddrLen = sizeof(sin); if (bind(listenSock, (sockaddr *)&sin, ServerAddrLen) = SOCKET_ERROR) printf(Bind error!n); return 0; if (listen(listenSock, 2) = SOCKET_ERROR) printf(Cant listen!n); return 0; remoteAddrLen = sizeof(remoteAddr); while (TRUE) conSock = accept(listenSock, (sockaddr *)& remoteAddr, &remoteAddrLen); if (conSock = INVALID_SOCKET) printf(Accept failed!n); continue; else printf(Accept a new connect : %s rn, inet_ntoa(remoteAddr.sin_addr); sendFile(conSock); closesocket(conSock); closesocket(listenSock); WSACleanup(); return 1; /client.cpp#include #include #include #include using namespace std;#define SERVERPORT 12345#pragma comment(lib, Wsock32)#pragma comment(lib, ws2_32)receiveFile(SOCKET consock) printf(Prepare to receive filen); FILE *dest; char destfile50; char recvBuff100; / Receive name of the file int namelen = recv(consock, recvBuff, 100, 0); memcpy(destfile, recvBuff, namelen); printf(Name of the file is %s n, destfile); if(dest=fopen(destfile,wb)=NULL) printf(Cant open the dest file); exit(0); / Receive size of the file int flag_file_len = recv(consock, recvBuff, 100, 0); long file_len = 0; for (int i = 0; flag_file_len != 0; i+) long temp = recvBuffi; for (int j = 0; j != i; j+) temp = temp * 10; file_len = file_len + temp; flag_file_len-; printf(Size of the file is %ldn, file_len); printf(Ready to receive filen); char ch; char chack = 1; int n; while ( recv(consock, &ch, 1, 0) fputc(ch, dest); send(consock, &chack, 1, 0); file_len-; if (file_len = 0) break; printf(.); printf(nTransmission finishedn);int main() WSADATA words; if(WSAStartup(MAKEWORD(2,2),&words)!=0) printf(Winsock init failedn); SOCKET conSock; conSock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (conSock = INVALID_SOCKET) printf(Socket create failedn); return 0; sockaddr_in servAddr; servAddr.sin_family = AF_INET; servAddr.