写了个UDP传输文件的东东.(经丢包测试)
先扔个头文件上来MARK下
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Code
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#pragma once
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#include "Net.h"
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/**//********************************************************************
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created: 2009/04/07
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created: 7:4:2009 17:10
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filename: f:\work\MyProject\myiu\IU\include\UDPFilesStrategy.h
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file path: f:\work\MyProject\myiu\IU\include
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file base: UDPFilesStrategy
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file ext: h
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author: kevin meng
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purpose: UDP传输文件的上层策略
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*********************************************************************/
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/**///////////////////////////////////////////////////////////////////////////
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//加载Files.lib
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#pragma comment (lib,"../bin/Files.lib")
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#include "Files.h"
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/**///////////////////////////////////////////////////////////////////////////
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//加载临界锁
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#include "CriticalSectionLock.h"
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/**//********************************************************************
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purpose: 滑动窗口 UDP 传送文件
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只使用了简单的滑动窗口机制
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实现:
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1.固定的窗口大小
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2.固定的传输速率
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没有实现:
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1.拥塞窗口机制
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2.RTT计算
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3.等等
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该类的App层:
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*********************************************************************/
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extern "C"
{
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//上层APP控制,必须继承的类(以该类虚函数为接口)
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class NET_API CUDPFilesStrategy_App
{
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public:
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CUDPFilesStrategy_App()
{};
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virtual ~CUDPFilesStrategy_App()
{};
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public:
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//由CUDPFilesStrategy 调用继承CUDPFilesStrategy_App 并实现DoOnFileSize 的函数 传递文件大小
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virtual void DoOnFileSize(uint nFileSize) = 0;
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//由CUDPFilesStrategy 调用继承CUDPFilesStrategy_App 并实现DoOnTransferState 的函数 说明现在传输的状态
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//************************************
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// Method: DoOnTransferState
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// FullName: CUDPFilesStrategy_App::DoOnTransferState
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// Access: virtual public
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// Returns: void
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// Qualifier:
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// Parameter: ushort nPercent (范围0-100)该参数为100时说明传输完毕
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// Parameter: uint nSpeed 传输速度(kb/s)
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// Parameter: uint nComplete 传输完成数量
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// Parameter: uint nSpare 传输剩余数量
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// Parameter: uint nTagID 标示传输文件的ID
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//************************************
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virtual void DoOnTransferState(ushort nPercent,uint nSpeed,uint nComplete,uint nSpare,uint nTagID = 0) = 0;
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//由CUDPFilesStrategy 调用继承CUDPFilesStrategy_App 并实现DoOnSend 的函数 发送数据
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virtual void DoOnSend(const char* pBuf,uint nBufSize,uint nTagID = 0/**//*标示传输文件的ID*/) = 0;
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protected:
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private:
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};
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class NET_API CUDPFilesStrategy
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{
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public:
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CUDPFilesStrategy(void);
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virtual ~CUDPFilesStrategy(void);
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protected:
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//判断该段是否在窗口内
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inline bool _InWindows(uint nPosition);
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void _SetFileSize(uint nFileSize);
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//常量
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typedef enum _E
{
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e_WindSize = 10,//窗口大小
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e_SendSpeed = 100,//发送速度PACK/S (每秒100KB)
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e_OnceSendSize = 1024//一次发送最大字节数(数据)
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};
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//消息ID
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typedef enum _E_MSG_ID
{
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e_SendData = 10000,//发送数据的ID
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e_RecvAck = 10001//发送ACK的ID
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};
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/**//////////////////////////////////////////////////////
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//消息结构体SR: SEND->RECV
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typedef struct tag_MSG_SR_DATA
{
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uint nMSGID;//_E_MSG_ID
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uint nSeq;//序号
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uint nSize;//数据区实际长度
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char szBuf[e_OnceSendSize];
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tag_MSG_SR_DATA(void)
{
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nMSGID = e_SendData;
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}
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};
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//#
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/**/////////////////////////////////////////////////////
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//消息结构体RS: RECV->SEND
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typedef struct tag_MSG_RS_ACK
{
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uint nMSGID;//_E_MSG_ID
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uint nSeq;//序号
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tag_MSG_RS_ACK(void)
{
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nMSGID = e_RecvAck;
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}
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};
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//#
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/**/////////////////////////////////////////////////////
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//线程相关
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HANDLE m_hThread;
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bool m_bThreadRun;
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//#
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/**////////////////////////////////////////////////////
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//当前窗口位置相关
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uint m_nCurrentPosition;//当前窗口起始位置1,2,3,4
从1开始
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CCriticalSectionLock m_iCurrentPositionLock;
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inline uint _GetCurrentPosition();
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inline void _SetCurrentPosition(uint val);
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//#
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/**////////////////////////////////////////////////////
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//文件操作,属性
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uint m_nFileBlock;//文件块数(文件按照一次发送大小最后计算出来的块数量)(不会改变)
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CCriticalSectionLock m_iFileBlockLock;
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inline uint _GetFileBlock();
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inline void _SetFileBlock(uint val);
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CFiles m_iCFiles;//操作文件的类
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uint m_nFileID;//传送或接收文件的ID;(不会改变)
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uint m_nFileSize;//文件长度(不会改变)
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//#
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CUDPFilesStrategy_App* m_piCUDPFilesStrategy_App;//上层APP的回调指针
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uint m_nSleekWindows;//滑动窗口大小
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uint m_nCongestionWindows;//拥塞窗口大小
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private:
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};
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class NET_API CUDPFilesStrategySend : public CUDPFilesStrategy
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{
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public:
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CUDPFilesStrategySend();
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virtual ~CUDPFilesStrategySend();
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public:
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//************************************
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// Method: BeginSendFile
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// FullName: CFilesUdp::BeginSendFile
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// Access: public
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// Returns: BOOL
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// Qualifier:
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// Parameter: const char * pszFilePath 文件路径
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// Parameter: CFilesUdpApp * pCFilesUdpApp 上层调动层的指针
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//************************************
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BOOL BeginSendFile(const char* pszFilePath,CUDPFilesStrategy_App* pCUDPFilesStrategy_App,uint nID);
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void EndSendFile(void);
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//由APP层调用的RECV(),APP层收到
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inline void RecvAck(const char* pBuf,uint nBufSize);
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protected:
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private:
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/**//////////////////////////////////////////////////////////
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//发送线程相关
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static unsigned __stdcall __ThreadSend(void* pData);
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void __ThreadSendFn(void);
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//#
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//发送数据前组包
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//************************************
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// Method: __CompositePacket
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// FullName: CUDPFilesStrategySend::__CompositePacket
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// Access: private
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// Returns: uint
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// Qualifier:
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// Parameter: IN const char * pBuf 传入数据
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// Parameter: uint nSize 传入数据大小
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// Parameter: OUT char * pSendBuf 组包后的数据
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// Parameter: uint nCurrentPosition 当前块ID
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//************************************
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inline uint __CompositePacket(IN const char* pBuf,uint nSize,OUT char* pSendBuf,uint nCurrentPosition);
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};
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class NET_API CUDPFilesStrategyRecv : public CUDPFilesStrategy
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{
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public:
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CUDPFilesStrategyRecv();
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virtual ~CUDPFilesStrategyRecv();
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public:
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BOOL BeginRecvFile(const char* pszFilePath,CUDPFilesStrategy_App* pCUDPFilesStrategy_App,uint nID);
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void EndRecvFile(void);
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//由APP层调用的RECV
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void RecvData(const char* pBuf,uint nBufSize);
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protected:
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private:
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static unsigned __stdcall __ThreadDelaySendACK(void* pData);//延迟发送ACK
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void __ThreadDelaySendACKFn(void);
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//解包
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// uint __ParsePacket(const char* pBuf,uint nSize,char* pSendBuf);
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};
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#include "UDPFilesStrategy.inl"
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}//extern "C"
posted @
2009-04-26 14:09
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