LabWindows中TCPip函数分析与实例.doc

LabWindows CVI TCP程序说明1 本系统框图如下：终端Client服务器sever路由交换机2 TCP函数说明2.1 Client Functions客户端ClientTCPRead (unsigned int conversationHandle, void *dataBuffer, size_t dataSize, unsigned int timeOut);参量1：操作柄、参量2：读入数据、参量3：读入数据长度、参量4：溢出时间。Return：读出数据的字节长度（可用来校验数据）。ClientTCPWrite (unsigned int conversationHandle, void *dataPointer, size_t dataSize, unsigned int timeOut);参量1：操作柄、参量2：输出数据、参量3：读入数据长度、参量4：溢出时间。Return：写入数据的字节长度（可用来校验数据）。ConnectToTCPServer (unsigned int *conversationHandle, unsigned int portNumber, char serverHostName, tcpFuncPtr callbackFunction, void *callbackData, unsigned int timeOut);参量1：操作柄、参量2：当前端口、参量3：服务器地址、参量4：回调函数、参量5：溢出时间Return：写入数据的字节长度（可用来校验数据）。DisconnectFromTCPServer (unsigned int conversationHandle);参量：操作柄2.2 Sever Functions服务器端DisconnectTCPClient (unsigned int conversationHandle);参量：操作柄RegisterTCPServer (unsigned int portNumber, tcpFuncPtr callbackFunction, void *callbackData);参量1：当前端口、参量2：回调函数、参量3：返回数据（NULL）ServerTCPRead (unsigned int conversationHandle, void *dataBuffer, size_t dataSize, unsigned int timeOut);参量1：操作柄、参量2：读入数据、参量3：读入数据长度、参量4：溢出时间。Return：读出数据的字节长度（可用来校验数据）。ServerTCPWrite (unsigned int conversationHandle, void *dataPointer, size_t dataSize, unsigned int timeOut);参量1：操作柄、参量2：输出数据、参量3：读入数据长度、参量4：溢出时间。Return：写入数据的字节长度（可用来校验数据）。UnregisterTCPServer (unsigned int portNumber);UnregisterTCPServerEx (unsigned int portNumber, const char localhostAddress);2.3 Support Functions 支持函数GetAllTCPHostAddresses (char *addresses, int *numberOfAddresses);参量1：network interface address、参量2：number of addressGetHostTCPSocketHandle (unsigned int connectionHandle, intptr_t *socketHandle);获取当前操作柄GetTCPHostAddr (char buffer, size_t bufferSize);获取本机的IP AddressGetTCPHostConnectionAddr (unsigned int connectionHandle, char buffer, size_t bufferSize);参量1：操作柄、参量2：输出地址、参量3：数据长度。GetTCPHostName (char buffer, size_t bufferSize);获取主机（本机）用户名。GetTCPPeerAddr (unsigned int connectionHandle, char buffer, size_t bufferSize);参量1：操作柄、参量2：输出地址、参量3：数据长度。获取对方的IP地址GetTCPPeerName (unsigned int connectionHandle, char buffer, size_t bufferSize);参量1：操作柄、参量2：输出地址、参量3：数据长度。获取对方的用户名SetTCPDisconnectMode (unsigned int conversationHandle, int disconnectMode);参量1：操作柄、参量2：模式选择。2.4 Other 其它函数*GetTCPErrorString (int errorNumber);根据当前错误代码，调出当前错误类型。char *GetTCPSystemErrorString (void);获取当前错误代码。int ProcessTCPEvents (void);获取当前TCP处理事件。TCPFreeMemory (void *pointerToMemory);释放内存。3 例程说明3.1 服务器sever/*function :TcpConnect连接 TcpDisconnect断开intput:N/A output:Tcpip.tcp_Port(600) TCP端口*/int CVICALLBACK TcpConnect (int panel, int control, int event,void *callbackData, int eventData1, int eventData2)int status=0;char tcp_Port10;switch (event)case EVENT_COMMIT:GetCtrlVal (panelHandle, PANEL_STRING_SERVER_PORT, tcp_Port);/ 获得TCP服务器端口号sscanf(tcp_Port, %u, &Tcpip.tcp_Port);status = RegisterTCPServer (Tcpip.tcp_Port, TcpServerCall, 0);if(!status) /注册成功 得到主机信息 Tcpip.tcp_Using=1;SetCtrlAttribute (panelHandle, PANEL_BUTTON_CONNECT, ATTR_DIMMED, 1);SetCtrlAttribute (panelHandle, PANEL_BUTTON_DISCONNECT, ATTR_DIMMED, 0);GetHostInfo();/获取主机信息break;return 0;/*function :TcpServerCall TCP接收数据处理部分（主机）intput:Tcpip.client_Handle操作柄output:*/int CVICALLBACK TcpServerCall(unsigned handle, int event, int error, void *callbackData) int i;char client_Ip50;char rev_Data200;char Rev_Length50;switch (event) case TCP_CONNECT: Tcpip.client_Handle = handle;/ 获得客户端句柄，赋给全局变量GetTCPPeerAddr (Tcpip.client_Handle, client_Ip, 50);/ 获得客户端 IP 地址 SetCtrlVal (panelHandle, PANEL_STRING_CLIENT_IP, client_Ip); / Client led亮为绿色SetCtrlAttribute (panelHandle, PANEL_LED_CLIENT, ATTR_ON_COLOR, VAL_GREEN);SetCtrlVal (panelHandle, PANEL_LED_CLIENT, 1); / Client led亮 / 设置 TCP 断开方式为自动SetTCPDisconnectMode (Tcpip.client_Handle, TCP_DISCONNECT_AUTO); break; case TCP_DATAREADY:memset (rev_Data, 0, 200); / 数组清0Tcpip.tcp_Rev_Length = ServerTCPRead (Tcpip.client_Handle, rev_Data, 200, 1000);/ 从TCP服务器读数据/de_protocol(data, read_len, ret_data, &ret_len);/ 协议解析for(i=0;ifunction :tcpCallback tcp连接回调函数input:handle操作柄 ouput:DATA传送到textbox上*/int tcpCallback(unsigned handle, int xType, int errCode, void *callbackData)char data256;char Rev_Length50;int tcp_Rev_Length;switch(xType)case TCP_DISCONNECT:SetCtrlVal (panelHandle, PANEL_LED_SERVER, 0);SetCtrlVal (panelHandle, PANEL_STRING_SERVERIP, );SetCtrlVal (panelHandle, PANEL_STRING_SERVERNAME, );break;case TCP_DATAREADY:ClientTCPRead (handle, data, 200, 1);datastrlen(data)+1=0;SetCtrlVal (panelHandle, PANEL_TEXTBOX, data