基于WinSock的简单TCP网络编程实验报告

实验报告实验课程名称： 通信软件基础实验课 学 院： 软件工程学院 专 业： 软件工程 指导教师： 报告人姓名： 学 号： 班 级： 学 期： 实验成绩实验项目名称基于WinSock的简单TCP网络编程一、实验目的与要求：1、学习和掌握Socket编程的面向连接编程模型。2、学习和掌握基于WinSock的TCP网络编程方法。二、实验设备及软件：笔记本电脑、Window 7操作系统、Microsoft Visual Studio 2012三、实验方法（原理、流程图）流程图：四、实验过程、步骤及内容实验代码：server.h#define MAX_CLIENT 10/同时服务的client数目上限#define MAX_BUF_SIZE 65535/缓存区的大小const u_short UDPSrvPort= 2345;/Server的UDP端口const char START_CMD= START;const char GETCURTIME_CMD= GET CUR TIME;/传递给TCP线程的结构化参数struct TcpThreadParamSOCKET socket;sockaddr_in addr;DWORD WINAPI TcpServeThread(LPVOID lpParam);/TCP线程的线程函数DWORD WINAPI UdpServer(LPVOID lpParam);/UDP服务器线程server.cpp#include stdafx.h#include iostream.h#include stdio.h#include string.h#include time.h#include WinSock2.h#include Windows.h#include server.h#pragma comment (lib, Ws2_32.lib)#pragma pack(1)/结构在存储时按字节对齐long TcpClientCount = 0;int main(int argc, char* argv)/检查命令行参数/if(argc != 2)/cerr Worng format!nCorrect usage: Server.exe ;/return -1;/初始化winsock2环境WSADATA wsa;if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0)cerr nFailed to initialize the winsock 2 stackn error code: WSAGetLastError() h_addr_list0;/绑定TCP端口if (bind(ListenSocket, (sockaddr*)&ListenAddr, sizeof(ListenAddr) = SOCKET_ERROR)cerr nFailed to bind the ListenSocketn error code: WSAGetLastError() endl;return -1;/监听if (listen(ListenSocket, SOMAXCONN) = SOCKET_ERROR)cerr nFailed to listen the ListenSocketn error code: WSAGetLastError() endl;return -1;cout TCP Server Started On TCP Port: ListenPort endl endl;SOCKET TcpSocket;SOCKADDR_IN TcpClientAddr;while (TRUE)/接受客户端连接请求int iSockAddrLen = sizeof(sockaddr);if (TcpSocket = accept(ListenSocket, (sockaddr*)&TcpClientAddr, &iSockAddrLen) = SOCKET_ERROR)cerr nFailed to accept the client TCP Socketn error code: WSAGetLastError() = MAX_CLIENT)closesocket(TcpSocket);cout Connection from TCP client inet_ntoa(TcpClientAddr.sin_addr) : ntohs(TcpClientAddr.sin_port) refused for max client numn endl;continue;cout Connection from TCP client inet_ntoa(TcpClientAddr.sin_addr) : ntohs(TcpClientAddr.sin_port) acceptedn endl;TcpThreadParam Param;Param.socket = TcpSocket;Param.addr = TcpClientAddr;/创建TCP服务线程DWORD dwThreadId;CreateThread(NULL, 0, TcpServeThread, &Param, 0, &dwThreadId);InterlockedIncrement(&TcpClientCount);cout Current Number of TCP Clients: TcpClientCount n socket;SOCKADDR_IN TcpClientAddr = (TcpThreadParam*)lpParam)-addr;/输出提示信息coutThread: GetCurrentThreadId() is serving client from inet_ntoa(TcpClientAddr.sin_addr) : ntohs(TcpClientAddr.sin_port) endl endl;/发送端口号+STARTsprintf(ServerTCPBuf, %5d%s, UDPSrvPort, START_CMD);send(TcpSocket, ServerTCPBuf, strlen(ServerTCPBuf), 0);cout Waiting for command from Client(s). endl endl;int TCPBytesReceived;time_t CurSysTime;while (TRUE)/读取client发来的请求命令: GET CUR TIMEmemset(ServerTCPBuf, 0, sizeof(ServerTCPBuf);TCPBytesReceived = recv(TcpSocket, ServerTCPBuf, sizeof(ServerTCPBuf), 0);/TCPBytesReceived值为0表示client端已正常关闭连接/TCPBytesRecieved值为SOCKET_ERROR则表示socket的状态不正常,无法继续数据通讯/两种情况下都表明本线程的任务已结束，需要退出if (TCPBytesReceived = 0 | TCPBytesReceived = SOCKET_ERROR)cout Client from inet_ntoa(TcpClientAddr.sin_addr) : ntohs(TcpClientAddr.sin_port) disconnected. Thread: GetCurrentThreadId() is ending endl endl;break;/检查收到的字符串是否为命令:GET CUR TIMEif (strcmp(ServerTCPBuf, GETCURTIME_CMD) != 0)cout Unknowm command from Client inet_ntoa(TcpClientAddr.sin_addr) endl endl;continue;cout Request for Current time from client inet_ntoa(TcpClientAddr.sin_addr) : ntohs(TcpClientAddr.sin_port) by TCP endl endl;/获取系统时间并发送给clienttime(&CurSysTime);memset(ServerTCPBuf, 0, sizeof(ServerTCPBuf);strftime(ServerTCPBuf, sizeof(ServerTCPBuf), %Y-%m-%d %H:%M:%S, localtime(&CurSysTime);send(TcpSocket, ServerTCPBuf, strlen(ServerTCPBuf), 0);cout Server Current Time: ServerTCPBuf n h_addr_list0;/绑定UDP端口if (bind(UDPSrvSocket, (sockaddr*)&UDPSrvAddr, sizeof(UDPSrvAddr) = SOCKET_ERROR )cerr bind() failed for UDPSrvSocketn error code: WSAGetLastError() endl;return -1;coutUDP Server Started On UDP Port: UDPSrvPort endl endl;while (TRUE)memset(ServerUDPBuf, 0, sizeof(ServerUDPBuf);/接收UDP请求int iSockAddrLen = sizeof(sockaddr);if (recvfrom(UDPSrvSocket, ServerUDPBuf, sizeof(ServerUDPBuf), 0, (sockaddr*)&UDPClientAddr, &iSockAddrLen) = SOCKET_ERROR)cerr recvfrom() failed for UDPSrvSocketn error code: WSAGetLastError() endl;continue;cout Client Command: Echonn;cout ServerUDPBuf received from inet_ntoa(UDPClientAddr.sin_addr) : ntohs(UDPClientAddr.sin_port) by UDP endl endl;/ECHOiSockAddrLen = sizeof(sockaddr);if (sendto(UDPSrvSocket, ServerUDPBuf, strlen(ServerUDPBuf), 0, (sockaddr*)&UDPClientAddr, iSockAddrLen) = SOCKET_ERROR )cerr sendto() failed for UDPSrvSocketn error code: WSAGetLastError() endl;continue;cout Echo ServerUDPBuf to clinet inet_ntoa(UDPClientAddr.sin_addr) : ntohs(UDPClientAddr.sin_port) by UDP endl endl;return 0;client.exe#include stdafx.h#include WinSock2.h#include iostream.h #include stdio.h#pragma comment (lib,Ws2_32.lib)#define MAX_BUF_SIZE 65535char ClientBufMAX_BUF_SIZE;const char START_CMD= START;const char GETCURTIME_CMD= GET CUR TIME;/输出用户选择界面void UserPrompt()cout Input the corresponding Num to select what you want the program to do endl endl t1. Get current time(TCP) endl t2. Echo Mode(UDP) endl t3. Exit the program endl endl Enter Your choice: ;int main(int argc, char* argv)unsigned short ServerUDPPort;SOCKET cTCPSocket,cUDPSocket;WSADATA wsadata;SOCKADDR_IN TCPServer,UDPServer,RecvFrom;int RecvFromLength=sizeof(RecvFrom);char UserChoice;char portnum5;unsigned long BytesReceived,BytesSent;int RetValue;/检查命令行参数if (argc != 3)coutWorng format!endlCorrect usage: Client.exe endl;return 1;u_long ServerIP = inet_addr(argv1);u_short ServerTCPPort = (u_short)atoi(argv2);/初始化winsock库if( ( RetValue=WSAStartup(MAKEWORD(2,2),&wsadata) ) !=0 )printf(WSAStartup() failed with error %dn, RetValue);return 2;/创建TCP Socketif( (cTCPSocket=WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED) ) =INVALID_SOCKET)printf(WSASocket() for cTCPSocket failed with error %dn ,WSAGetLastError() );return 3;/创建UDP Socketif( (cUDPSocket=WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,WSA_FLAG_OVERLAPPED) ) =INVALID_SOCKET)printf(WSASocket() for cUDPSocket failed with error %dn ,WSAGetLastError() );return 4;TCPServer.sin_family=AF_INET;TCPServer.sin_port=htons(ServerTCPPort);TCPServer.sin_addr.S_un.S_addr=ServerIP;/通过TCP Socket连接serverif (RetValue=WSAConnect(cTCPSocket,(sockaddr *)&TCPServer,sizeof(TCPServer),NULL,NULL,NULL,NULL) )=SOCKET_ERROR)printf(WSAConnect() failed for cTCPSocket with error %dn,WSAGetLastError() );printf(Cant connect to server.n);return 5;/与server建立连接后读取Server发送过来的Server UDP端口和STARTBytesReceived=recv(cTCPSocket,ClientBuf,sizeof(ClientBuf),0 );if (BytesReceived = 0 | BytesReceived = SOCKET_ERROR)coutendlServer refused the connection or recv failedendl;return 6;memcpy(portnum,ClientBuf,sizeof(portnum);ServerUDPPort=(u_short)atoi(portnum);if (strcmp(START_CMD,ClientBuf+5)!=0)coutendlServer did not return right beginning indicatorendl;return 6;elsecoutendlOK, NOW the server is ready for your service!endlUserChoice;switch(UserChoice)case 1:/通过TCP得到server的系统时间/发送命令memset(ClientBuf,0,sizeof(ClientBuf);sprintf(ClientBuf,%s,GETCURTIME_CMD);if (BytesSent=send(cTCPSocket,ClientBuf,strlen(ClientBuf),0) )=SOCKET_ERROR)printf(send() failed for cTCPSocket with error %dn,WSAGetLastError() );printf(Can not send command to server by TCP.Maybe Server is down.n);return 7;/读取server发来的系统时间并显示memset(ClientBuf,0,sizeof(ClientBuf) );if (BytesReceived=recv(cTCPSocket,ClientBuf,sizeof(ClientBuf),0) )=SOCKET_ERROR)printf(recv() failed for cTCPSocket with error %dn,WSAGetLastError() );printf(Can not get server current systime.Maybe Maybe Server is down.n);return 8;coutServer Current Time: ClientBufendlendl;break;case 2: /通过UDP实现ECHO/提示用户输入文本memset(ClientBuf,0,sizeof(ClientBuf) );cout请输入任意文本信息，按回车键后将发送至Server.endl;gets(ClientBuf);/发送文本if (BytesSent=sendto(cUDPSocket,ClientBuf,strlen(ClientBuf),0,(sockaddr *)&UDPServer,sizeof(UDPServer) ) ) =SOCKET_ERROR)printf(sendto() failed for cUDPSocket with er