一个简单的UDPServer实现一、思路1、建立接收socket,将socket和指定的端口绑定2、创建接收线程，在线程中调用ioctlsocket()判断是否接收到数据，接收到数据时调用OnReceive()(类似CSocket中的OnReceive())3、在OnReceive中申请空间调用recvfrom接收数据4、建立发送socket，和INADDR_ANY绑定5、调用sendto发送数据二、本代码直接使用socketAPI实现UDP通讯相关的函数有：WSAStartup(WORDwVersionRequested,LPWSADATAlpWSAData);//初始化socket库WSACleanup();//释放socket库socket(intaf,inttype,intprotocol);//建立socketsetsockopt(SOCKETs,intlevel,intoptname,constcharFAR*optval,intoptlen);//设置socket或者协议的属性bind(SOCKETs,conststructsockaddrFAR*name,intnamelen);//地址和socket绑定sendto(SOCKETs,constcharFAR*buf,intlen,intflags,conststructsockaddrFAR*to,inttolen);//发送消息ioctlsocket(SOCKETs,longcmd,u_longFAR*argp);//获取socket状态，可以获取socket缓冲中数据长度，利用这个函数可以实现类似CSocket中的OnReceive()函数(在接收数据之前调用)recvfrom(SOCKETs,charFAR*buf,intlen,intflags,structsockaddrFAR*from,intFAR*fromlen);//接收数据三、代码说明1、UDPServer.h和UDPServer.cpp是实现类CUDPServer的头文件和实现文件，udpdemo.cpp是演示程序2、编译环境在win2000vc6.0下编译通过3、编译时需要在vc的project的setting中连接Ws2_32.lib库//UDPServer.h:interfacefortheCUDPServerclass.////////////////////////////////////////////////////////////////////////#if!defined(UDPSERVER_H_INCLUDED_)#defineUDPSERVER_H_INCLUDED_#if_MSC_VER>1000#pragmaonce#endif//_MSC_VER>1000#include//Ws2_32.lib#defineCLOSE_SOCKET(X)if(X!=INVALID_SOCKET){closesocket(X);X=INVALID_SOCKET;}classCUDPServer{private:charm_szLocalIP[20];charm_szHostName[30];intm_RecvPort;charm_szRemoteIP[20];intm_RemotePort;HANDLEm_RecvThread;DWORDm_ThreadID;private:voidInitMemberVariable();public:SOCKETm_SckRecive;SOCKETm_SckSend;boolm_bReciveFlag;CUDPServer();virtual~CUDPServer();voidInitialize();voidDestory();//初始化socketlibboolInitSocketLib(WORDwVersion=0x0202);voidCleanSocketLib();//创建发送socketboolCreateSendSocket();//创建接收socketboolCreateRecvSocket(intRecvPort=9527);//发送intSendMsg(char*szBuf,intlength,char*szremoteIP=NULL,intport=0);//启动接收线程boolStartRecv();//停止接收线程boolStopRecv();//接收线程函数，staticDWORDWINAPIReceiveThread(LPVOIDlpParameter);//线程函数//当有数据时，调用OnReceive,length表示数据长度voidOnReceive(longlength);staticDWORDWINAPIOnReceiveThread(LPVOIDlpParameter);//线程函数};#endif//!defined(UDPSERVER_H_INCLUDED_)//UDPServer.cpp:implementationoftheCUDPServerclass.////////////////////////////////////////////////////////////////////////#include"UDPServer.h"#include////////////////////////////////////////////////////////////////////////Construction/Destruction////////////////////////////////////////////////////////////////////////********************************************************************CUDPServer::CUDPServer(){Initialize();}//********************************************************************CUDPServer::~CUDPServer(){Destory();}//********************************************************************voidCUDPServer::Initialize(){InitSocketLib(0x0202);InitMemberVariable();}//********************************************************************voidCUDPServer::Destory(){if(m_bReciveFlag){StopRecv();}CleanSocketLib();}//********************************************************************voidCUDPServer::InitMemberVariable(){memset(m_...
