一个VC写的远程控制例子《VC网络通信编程实例案例精选》源代码

//服务器端：发送本机桌面到连接的客户端 #include <winsock2.h> #include <stdio.h> #include <stdlib.h> #include <winuser.h> #include "Server.h" #include "Command.h" #include "Gdi.h" #include "HuffCompress.h" #include "RLE.h" //默认端口 #define DEFAULT_PORT 5150 #define SETFLAGS XP1_GUARANTEED_DELIVERY|XP1_GUARANTEED_ORDER #define NOTSETFLAGS XP1_CONNECTIONLESS #define LPBMIH LPBITMAPINFOHEADER UINT gPort = DEFAULT_PORT; int nGridX = 8; int nGridY = 2; DWORD dwLen,dwCompress,dwSendLen; int iCompressionLevel = 10; HWND hServerWnd; HDC hDDC = NULL,hMemDC,hNullDC; BOOL fChange = FALSE; SOCKET Socket; SOCKET Listen; int iWidth,iHeight; WORD bmBitsPixel = 4; // 指向全局位图 BOOL fDIBitmap = FALSE; // GDI区域结构 struct GdiList GdiStart; struct GdiList *pGdiNode; // 这个结构用来在LPARAM参数中传递信息到客户端线程 struct myStruct { SOCKET Socket; HWND hWnd; }; int SelectProtocols(DWORD dwSetFlags,DWORD dwNotSetFlags,LPWSAPROTOCOL_INFO lpProtocolBuffer,LPDWORD lpdwBufferLength,WSAPROTOCOL_INFO *pProtocol); //LoadWinsock用来装载和初始化Winsock，绑定本地地址，创建监听socket，等候客户端连接 DWORD WINAPI LoadWinsock(LPVOID lpParam) { // 协议变量 LPBYTE pBuf; WSAPROTOCOL_INFO Protocol; int nRet; int nZero = 0; int iAddrSize; HANDLE hThread; DWORD dwThreadId; char szClientIP[81]; char szString[255]; struct sockaddr_in local,client; // 这个结构用来在LPARAM参数中传递信息到客户端线程 struct myStruct myStructure; // 为协议的选择和所有协议的变量决定需要的缓冲区的大小 dwLen = 0; nRet = WSAEnumProtocols(NULL,NULL,&dwLen); if (nRet == SOCKET_ERROR) { if (WSAGetLastError() != WSAENOBUFS) return 1; } pBuf = malloc(dwLen); // 为WSASocketGet()得到协议 nRet = SelectProtocols(SETFLAGS,NOTSETFLAGS,(LPWSAPROTOCOL_INFO)pBuf,&dwLen,&Protocol); // 创建我们的监听socket Listen = WSASocket(AF_INET,SOCK_STREAM,IPPROTO_IP,NULL,0,SOCK_STREAM); if (Listen == SOCKET_ERROR) { sprintf(szString,"socket() failed: %d",WSAGetLastError()); MessageBox(NULL,szString,"Remote Server",MB_OK); return 1; } // 设置server端信息 local.sin_addr.s_addr = htonl(INADDR_ANY); local.sin_family = AF_INET; local.sin_port = htons(gPort); // 绑定到socket if (bind(Listen,(struct sockaddr *)&local,sizeof(local)) == SOCKET_ERROR) { sprintf(szString,"bind() failed: %d\n", WSAGetLastError()); MessageBox(NULL,szString,"Remote Server",MB_OK); return 1; } //为了减小CPU的利用率，禁止在socket上将数据发送到缓冲。设置SO_SNDBUF为0, //从而使winsock直接发送数据到客户端，而不是将数据缓冲才发送。 nZero = 0; setsockopt(Listen,SOL_SOCKET,SO_SNDBUF,(char *)&nZero,sizeof(nZero)); //开始监听 listen(Listen,SOMAXCONN); iAddrSize = sizeof(client); while (TRUE) { // 阻塞方式的接收客户端的连接，但因为这是一个线程函数，所以用户不会感到阻塞 Socket = accept(Listen,(struct sockaddr *)&client,&iAddrSize); if (Socket != INVALID_SOCKET) { // 设置传到客户端线程的信息的数据结构 myStructure.Socket = Socket; myStructure.hWnd = hServerWnd; //找出客户端的IP地址 memset(szClientIP,'\0',sizeof(szClientIP)); sprintf(szClientIP,"%s",inet_ntoa(client.sin_addr)); // 为每一个客户端创建一个线程 hThread = CreateThread(NULL,0,ClientThread,(LPVOID)&myStructure,0,&dwThreadId); if (hThread) { //关闭线程句柄 CloseHandle(hThread); } } else return 1; } return 0; } //客户端线程函数，这个函数等候从客户端程序发送过来的消息， //如果这个消息是"REFRESH",那么它发送当前的桌面图片 //如果这个消息是"DISCONNECT",那么它结束和客户端的连接 //如果这个消息以"WM_"开头，那么它就根据消息类型，在服务器端执行该消息 DWORD WINAPI ClientThread(LPVOID lpParam) { HWND hWnd; SOCKET MySocket; FD_SET SocketSet; struct timeval timeout; char szMessage[2049]; DWORD iRecv; struct myStruct *myStructure; DWORD iLength; DWORD iRet; int iUpdates; // 分析参数 myStructure = (struct myStruct *)lpParam; MySocket = myStructure->Socket; hWnd = myStructure->hWnd; // 设置超时值 timeout.tv_sec = 0; // 秒 timeout.tv_usec = 0; // 微秒 // 设置Socket集合 SocketSet.fd_count = 1; SocketSet.fd_array[1] = MySocket; // 轮询sockets while(TRUE) { // 等候发送过来的数据直到超时 iRet = select(0,&SocketSet,NULL,NULL,&timeout); if (iRet != 0) { //初始化缓冲 memset(szMessage,'\0',sizeof(szMessage)); // 阻塞方式调用recv() iRecv = recv(MySocket,szMessage,2048,0); szMessage[iRecv] = '\0'; CHECK_MSG: // 是不是"REFRESH"消息 if (strncmp(szMessage,"REFRESH",7) == 0) { // 捕获并且发送桌面的更新的区域 iUpdates = SendRegionDisplay(hServerWnd,MySocket); } // 检查从客户端发送过来的Windows 命令消息，这是一个核心部分 else if (strncmp(szMessage,"WM_",3) == 0) { // 解析从客户端发送过来的消息并发送到本机的消息队列 DispatchWMMessage(szMessage); // 看看是否还有消息 iLength = strlen(szMessage); if (iLength > 0) goto CHECK_MSG; } // 检查是否是查询消息 else if (strncmp(szMessage,"RESOLUTION",10) == 0) { SendResolution(MySocket); } // 检查是否是DISCONNECT消息 else if (strncmp(szMessage,"DISCONNECT",10) == 0) { fChange = FALSE; fDIBitmap = FALSE; pGdiNode = GdiStart.pNext; while (pGdiNode) { free(pGdiNode->Gdi.pDIBitmap); free(pGdiNode->Gdi.pDIBChangeStart); pGdiNode->Gdi.fDIBitmap = FALSE; pGdiNode->Gdi.fChange = FALSE; pGdiNode = pGdiNode->pNext; } // 停止查询，相当于结束该线程 break; } } } closesocket(MySocket); return 0; } // 解析从客户端发送过来的消息并发送到本机的消息队列 void DispatchWMMessage(char *szString) { //鼠标消息 struct {char *szWMMouseMsg;} WMMouseMsg[] = {"WM_MM","WM_LBD","WM_LBU","WM_LBK", "WM_MBD","WM_MBU","WM_MBK", "WM_RBD","WM_RBU","WM_RBK"}; // 键盘消息 struct {char *szWMKeyBdMsg;} WMKeyBdMsg[] = {"WM_KD","WM_KU"}; // 通用消息：色彩模式，网格数和压缩消息 struct {char *szMsg;} Msg[] = {"WM_COMP","WM_GRID","WM_CMOD"}; int nWMMouseMsg; int nWMKeyBdMsg; int nMsg; struct CommandList CommandStart; struct CommandList *pCommandNode; struct CommandDS Command; char *pDest; int iLoc,nChar; int iLoop,iParms; char szString2[2049]; // 分别得到鼠标，键盘，通用消息的数目 nWMMouseMsg = (int)(sizeof(WMMouseMsg)/sizeof(WMMouseMsg[0])); nWMKeyBdMsg = (int)(sizeof(WMKeyBdMsg)/sizeof(WMKeyBdMsg[0])); nMsg = (int)(sizeof(Msg)/sizeof(Msg[0])); // 初始化command链表 CommandStart.pNext = NULL; pCommandNode = &CommandStart; // 分析command命令，截获命令的参数 iParms = 0; while (pDest = strchr(szString,';')) { iLoc = pDest - szString; nChar = iLoc; memset(Command.szElement,'\0',sizeof(Command.szElement)); strncpy(Command.szElement,szString,nChar); // 发送到命令栈中 pCommandNode = Add_Command(pCommandNode,Command); memset(szString2,'\0',sizeof(szString2)); strcpy(szString2,&szString[iLoc + 1]); strcpy(szString,szString2); iParms++; if (iParms == 5) // 每条命令5个参数 break; } // 处理命令 pCommandNode = CommandStart.pNext; if (pCommandNode) { // 鼠标消息 UINT keyFlags; int iMessage; int fWMMouseMsg; double iScaleX,iScaleY,iX,iY; DWORD dwX,dwY; // 键盘消息 int fWMKeyBdMsg; UINT vk; int fDown; int cRepeat; UINT flags; // 判断是否有鼠标消息 fWMMouseMsg = FALSE; for (iLoop = 0;iLoop < nWMMouseMsg;iLoop++) { if (strcmp(pCommandNode->Command.szElement,WMMouseMsg[iLoop].szWMMouseMsg) == 0) { // 设置鼠标消息的标志 fWMMouseMsg = TRUE; // 具体的鼠标消息 if (strcmp(WMMouseMsg[iLoop].szWMMouseMsg,"WM_MM\0") == 0) iMessage = 1; else if (strcmp(WMMouseMsg[iLoop].szWMMouseMsg,"WM_LBD\0") == 0) iMessage = 2; else if (strcmp(WMMouseM