LabWindows中TCPip函数分析与实例

1、精选优质文档-倾情为你奉上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 conve

2、rsationHandle, 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 ti

3、meOut);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, voi

4、d *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

5、, 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)

6、;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

7、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

8、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

9、.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)

10、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_CONNE

11、CT, 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

12、, 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, clien

13、t_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

14、); / 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;i<strlen(rev_Data);i+)/取出数据Tcpip.tcp_Rev_Datai=rev_Datai;SetCtrlVal (panelHandle, PANEL_TEXTBOX_TCP_ASCII, "n接收到数据：");S

15、etCtrlVal (panelHandle, PANEL_TEXTBOX_TCP_ASCII, rev_Data);SetCtrlVal (panelHandle, PANEL_TEXTBOX_TCP_ASCII, "n");SetCtrlVal (panelHandle, PANEL_TEXTBOX_TCP_ASCII, "*");SetCtrlVal (panelHandle, PANEL_TEXTBOX_TCP_ASCII, "n");sprintf(Rev_Length, "Read from TCP Client

16、: %d Bytes", Tcpip.tcp_Rev_Length); SetCtrlVal (panelHandle, PANEL_TEXTBOX_TCP_ASCII, Rev_Length); / 显示接收数据长度 break; case TCP_DISCONNECT: if(handle=Tcpip.client_Handle) / 因为断开方式被设置为自动，所以这里不需要调用DisconnectTCPClient Tcpip.client_Handle = 0;/ Disconnect时不需要再断了 SetCtrlVal (panelHandle, PANEL_LED_CLI

17、ENT, 0); / Client led灭 SetCtrlVal (panelHandle, PANEL_STRING_CLIENT_IP, ""); / 清空 IP 栏 break; return 0;注：发送数据、获取信息都是一些很简单的调用，不再介绍。3.2 客户端Clientint CVICALLBACK connect (int panel, int control, int event,void *callbackData, int eventData1, int eventData2)char sever_Addr20;char sever_Name20;

18、char sever_Port10;char message_Buffer255;int status=0;switch (event)case EVENT_COMMIT:GetCtrlVal (panelHandle, PANEL_STRING_ADDRESS, sever_Addr);GetCtrlVal (panelHandle, PANEL_STRING_PORTNUMBER, sever_Port);sscanf(sever_Port, "%u", &Tcpip.tcp_Port);DisableBreakOnLibraryErrors ();status

19、=ConnectToTCPServer (&Tcpip.client_Handle, Tcpip.tcp_Port, sever_Addr, tcpCallback, 0, 0);EnableBreakOnLibraryErrors ();if(!status)Tcpip.tcp_Using=1;/链接标识位GetTCPPeerName (Tcpip.client_Handle, sever_Name, 20);SetCtrlVal (panelHandle, PANEL_STRING_SERVERIP, sever_Addr);SetCtrlVal (panelHandle, PAN

20、EL_STRING_SERVERNAME, sever_Name);SetCtrlAttribute (panelHandle, PANEL_LED_SERVER, ATTR_ON_COLOR, VAL_RED);SetCtrlVal (panelHandle, PANEL_LED_SERVER, 1);SetCtrlAttribute (panelHandle, PANEL_CMD_CONNECT, ATTR_DIMMED, 1);SetCtrlAttribute (panelHandle, PANEL_CMD_DISCONNECT, ATTR_DIMMED, 0); else/超时溢出sp

21、rintf(message_Buffer, "TCP library error message: %snSystem error message: %s", GetTCPErrorString (status), GetTCPSystemErrorString(); MessagePopup ("Error", message_Buffer); break;return 0;/*>>>function :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 x