iocp-socket 服务（借鉴别人的，根据自己的需要改的）未完待续

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#pragma once #include <WinSock2.h> #include <MSWSock.h> #include <Windows.h> #pragma comment(lib,"ws2_32.lib")   #define BUFFER_SIZE (1024*8) // 8KB #define BUFFER_SIZE_DATA (3*BUFFER_SIZE )   #define NOTIFY_MSG_ACCEPT   0xa1 #define NOTIFY_MSG_CONNECT  0xa2 #define NOTIFY_MSG_DISCONNECT 0xa3 #define NOTIFY_MSG_READ     0xa4 #define NOTIFY_MSG_WRITE    0xa5     struct PER_IO_BUFFER {     WSAOVERLAPPED ol;     SOCKET      sClient ;       //the socket of client use by AcceptEx      LPBYTE      lpBuffer;       // the pointer of buffer     DWORD       dwBufferSize;   // the size of buffer     DWORD       dwTrans ;       // the size of io-trans     BYTE        opType;         // opteion type #define OP_ACCEPT   6 #define OP_CONNECT  7 #define OP_WRITE    8 #define OP_READ     9     PER_IO_BUFFER*  pNext;      // next buffer   };   struct PER_HANDLE_DATA {     SOCKET s;     SOCKADDR_IN saddr;     BOOL bConnect;     BYTE readBytes[BUFFER_SIZE_DATA];     DWORD dwBufferOffSet;     HANDLE m_hWriteComplete ;     //DWORD dwBufferSize;     PER_HANDLE_DATA* pNext; };   typedef void (__stdcall* PNOTIFYPROC)(PER_HANDLE_DATA*,PER_IO_BUFFER* ,DWORD ); class Ciocp { private:     HANDLE  m_hIocp;            // iocp handle     SOCKET  m_sListen;          // the socket of listen     SOCKET  m_sConnect;         // the socket of connect     DWORD   m_dwProt;           // the port of listen     DWORD   m_dwMaxConns;       // the max count of connectios     DWORD   m_dwMaxFreeBuffers; // the max count of freebuffers     DWORD   m_dwMaxFreeContexts;// the max count of freecontexts     DWORD   m_dwInitOp;         // the count of init-op     ULONGLONG m_ulWriteBytes;   // the total of write-bytes     ULONGLONG m_ulReadBytes;    // the total of read-bytes       DWORD m_dwWorkThreadCount ; // the count of worker thread     DWORD m_dwCurWorkThreadCount ;     CRITICAL_SECTION m_csWorkLock ;     CRITICAL_SECTION m_csIoLock ;       CRITICAL_SECTION m_csBuffersListLock;       // the cs-lock of free-buffers-list     CRITICAL_SECTION m_csContextsListLock;      // the cs-lock of free-count     DWORD           m_dwBuffersCount;           // the count of cur buffers     DWORD           m_dwContextsCount;          // the count of cur contexts       PER_IO_BUFFER* m_pFreeBuffersList;      // the list of free-buffers     PER_HANDLE_DATA* m_pFreeContextsList;   // the list of free-contexts       SOCKADDR_IN     m_siRemoteAddr ;     bool            m_bStarted ;            // the status of socket server       LPFN_ACCEPTEX               m_lpfnAcceptEx ;     LPFN_GETACCEPTEXSOCKADDRS   m_lpfnGetAcceptExSockAddrs;     LPFN_CONNECTEX              m_lpfnConnectEx ;     PNOTIFYPROC                 m_pNotifyProc;       BOOL PostAccept();     BOOL PostWrite(PER_HANDLE_DATA* pContext, LPBYTE lpBuffer, DWORD dwSize);     BOOL PostRead(PER_HANDLE_DATA* pContext);     BOOL PostConnect();     static unsigned int WINAPI _WorkerThreadProc(LPVOID lpParam);     PER_IO_BUFFER* AllocBuffer(DWORD dwSize = BUFFER_SIZE);     PER_HANDLE_DATA* AllocContext(SOCKET s);     void ReleaseContext(PER_HANDLE_DATA* pContext);     void ReleaseIoBuffer(PER_IO_BUFFER* pBuffer);     void CreateWokerThreads();     void CreateIocp();     void AddSocketToIocp(SOCKET s, PER_HANDLE_DATA* pContext=0);     void DecCurWorkCount();     void HandleIoOp(PER_HANDLE_DATA* pContext,PER_IO_BUFFER* pBuffer,DWORD dwTrans);     void NotifyMsg(PER_HANDLE_DATA* pContext,PER_IO_BUFFER* pBuffer, DWORD dwMsg);     void ProcessIoRead(PER_HANDLE_DATA* pContext, PER_IO_BUFFER* pBuffer, DWORD dwTrans);     BOOL SetKeepAlive(SOCKET s);     void ProcessIoConnect(PER_HANDLE_DATA* pContext, PER_IO_BUFFER* pBuffer, DWORD dwTrans);     void ProcessIoAccept(PER_HANDLE_DATA* pContext, PER_IO_BUFFER* pBuffer, DWORD dwTrans); public:     Ciocp(void);     ~Ciocp(void);     BOOL Start(PNOTIFYPROC pNotifyProc, DWORD dwPort=8080,DWORD dwMaxConns= 2000,DWORD dwMaxFreeBuffers = 100,DWORD dwMaxFreeContexts =100 ,DWORD dwInitOp = 5 );     void Shutdown();     BOOL Connect(PNOTIFYPROC pNotifyProc, LPSTR lpstrIp = "127.0.0.1",DWORD dwPort=443 );     void GetStatisticsData(ULONGLONG* pulRead,ULONGLONG* pulWrite);     void Send(PER_HANDLE_DATA* pContext,LPBYTE lpBuffer,DWORD dwSize);     void ProcessIoWrite(PER_HANDLE_DATA* pContext, PER_IO_BUFFER* pBuffer, DWORD dwTrans);   };

　　

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#include "StdAfx.h" #include "iocp.h" #include <process.h> #include <mstcpip.h>     Ciocp::Ciocp(void) {       m_hIocp = INVALID_HANDLE_VALUE ;     m_sListen = INVALID_SOCKET ;     m_sConnect = INVALID_SOCKET ;     m_dwInitOp =5;     m_dwMaxConns = 2000;     m_dwMaxFreeContexts = 100;     m_dwMaxFreeBuffers = 100 ;     m_ulWriteBytes =0;     m_ulReadBytes = 0;     // get max worker count     SYSTEM_INFO sys_info ;     GetSystemInfo(&sys_info);     m_dwWorkThreadCount = sys_info.dwNumberOfProcessors *2 ;     m_dwCurWorkThreadCount = 0;     InitializeCriticalSection(& m_csBuffersListLock);     InitializeCriticalSection(& m_csContextsListLock);     InitializeCriticalSection(& m_csWorkLock);     InitializeCriticalSection((& m_csIoLock));     m_dwBuffersCount = 0;     m_dwContextsCount = 0;       m_pFreeBuffersList = NULL ;     m_pFreeContextsList = NULL ;       m_lpfnAcceptEx = NULL ;     m_lpfnConnectEx = NULL ;     m_lpfnGetAcceptExSockAddrs = NULL ;     m_bStarted = false ;       m_dwProt = 0;     WSADATA wsaData ;     WORD sockVerSion = MAKEWORD(2,2);     WSAStartup(sockVerSion,&wsaData); }     Ciocp::~Ciocp(void) {     DeleteCriticalSection(& m_csBuffersListLock);     DeleteCriticalSection(& m_csContextsListLock);     DeleteCriticalSection(& m_csWorkLock);     DeleteCriticalSection(& m_csIoLock);     if (m_sListen != INVALID_SOCKET)     {         closesocket(m_sListen);     }       if (m_sConnect != INVALID_SOCKET)     {         closesocket(m_sConnect);     } }   BOOL Ciocp::Start(PNOTIFYPROC pNotifyProc, DWORD dwPort/*=8080*/,DWORD dwMaxConns/*= 2000*/,DWORD dwMaxFreeBuffers /*= 100*/,DWORD dwMaxFreeContexts /*=100 */,DWORD dwInitOp /*= 5 */) {     m_pNotifyProc = pNotifyProc ;     m_dwProt = dwPort;     m_dwMaxConns = dwMaxConns;     m_dwMaxFreeBuffers = dwMaxFreeBuffers;     m_dwMaxFreeContexts = dwMaxFreeContexts;     m_dwInitOp = dwInitOp ;       m_sListen = WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED);     SOCKADDR_IN saddr ;     saddr.sin_family = AF_INET;     saddr.sin_port = ntohs(m_dwProt);     saddr.sin_addr.S_un.S_addr = INADDR_ANY ;     m_bStarted = true ;       if (bind(m_sListen,(SOCKADDR*)&saddr,sizeof(saddr)) == SOCKET_ERROR)     {         m_bStarted = false ;         return FALSE ;     }       listen(m_sListen,m_dwMaxConns);       CreateIocp();       GUID guidAcceptEx = WSAID_ACCEPTEX ;     DWORD dwBytes ;     WSAIoctl(m_sListen,SIO_GET_EXTENSION_FUNCTION_POINTER,&guidAcceptEx,sizeof(guidAcceptEx),&m_lpfnAcceptEx,sizeof(m_lpfnAcceptEx),&dwBytes,NULL,NULL);       GUID guidGetAcceptExSockAddrs = WSAID_GETACCEPTEXSOCKADDRS ;       WSAIoctl(m_sListen,SIO_GET_EXTENSION_FUNCTION_POINTER,&guidGetAcceptExSockAddrs,sizeof(guidGetAcceptExSockAddrs),&m_lpfnGetAcceptExSockAddrs,sizeof(m_lpfnGetAcceptExSockAddrs),&dwBytes,NULL,NULL);       AddSocketToIocp(m_sListen);     //create worker     CreateWokerThreads();           // post accept           for(int i=0;i < m_dwInitOp;i++)     {                   PostAccept();     }           }   BOOL Ciocp::PostAccept() {     // set io type     PER_IO_BUFFER* pBuffer = NULL ;     pBuffer = (PER_IO_BUFFER*)AllocBuffer(BUFFER_SIZE);     pBuffer->opType = OP_ACCEPT ;       // post io     DWORD dwBytes ;     DWORD dwAddrSize = sizeof(SOCKADDR_IN)+16 ;     pBuffer->sClient = WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED); //  BOOL b = m_lpfnAcceptEx(m_sListen,pBuffer->sClient, //      pBuffer->lpBuffer,pBuffer->dwBufferSize-dwAddrSize*2 //      ,dwAddrSize,dwAddrSize,&dwBytes,&pBuffer->ol);     BOOL b = m_lpfnAcceptEx(m_sListen,pBuffer->sClient,         pBuffer->lpBuffer,0         ,dwAddrSize,dwAddrSize,&dwBytes,&pBuffer->ol);     if (!b && WSAGetLastError() != WSA_IO_PENDING)     {         return FALSE ;     }       return TRUE;     }   BOOL Ciocp::PostWrite(PER_HANDLE_DATA* pContext, LPBYTE lpBuffer, DWORD dwSize) {     PER_IO_BUFFER* pBuffer = AllocBuffer();     pBuffer->opType = OP_WRITE;       // post i/o     DWORD dwBytes;      DWORD dwFlags = 0;      WSABUF buf;      buf.buf = (char*)lpBuffer;      buf.len = dwSize  ;      if(::WSASend(pContext->s, &buf, 1, &dwBytes, dwFlags, &pBuffer->ol, NULL) != NO_ERROR)      {          if(::WSAGetLastError() != WSA_IO_PENDING)          {                return FALSE;          }      }        return TRUE ;       }   BOOL Ciocp::PostRead(PER_HANDLE_DATA* pContext) {     PER_IO_BUFFER* pBuffer = AllocBuffer();     pBuffer->opType = OP_READ;       // post i/o     DWORD dwBytes;      DWORD dwFlags = 0;      WSABUF buf;      buf.buf = (char*)pBuffer->lpBuffer;      buf.len = pBuffer->dwBufferSize  ;      if(::WSARecv(pContext->s, &buf, 1, &dwBytes, &dwFlags, &pBuffer->ol, NULL) != NO_ERROR)      {          if(::WSAGetLastError() != WSA_IO_PENDING)          {                            return FALSE;          }      }        return TRUE ; }   BOOL Ciocp::PostConnect() {     PER_IO_BUFFER* pBuffer = NULL ;       pBuffer = (PER_IO_BUFFER*)AllocBuffer(BUFFER_SIZE);       SOCKADDR_IN saddr ;     saddr.sin_family = AF_INET;     saddr.sin_port = htons(0);     saddr.sin_addr.s_addr = htonl(ADDR_ANY);       if (m_sConnect != INVALID_SOCKET)     {         closesocket(m_sConnect);         m_sConnect = INVALID_SOCKET ;     }     m_sConnect = WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED);       if (bind(m_sConnect,(SOCKADDR*)&saddr,sizeof(saddr)) == SOCKET_ERROR)     {         m_bStarted = false ;         return FALSE ;     }                 PER_HANDLE_DATA *pContext = AllocContext(m_sConnect);     pContext->bConnect = TRUE ;     AddSocketToIocp(m_sConnect,pContext);     //create worker           if (m_lpfnConnectEx == NULL )     {         GUID guidConnectex = WSAID_CONNECTEX ;         DWORD dwBytes ;         WSAIoctl(m_sConnect,SIO_GET_EXTENSION_FUNCTION_POINTER,&guidConnectex,sizeof(guidConnectex),&m_lpfnConnectEx,sizeof(m_lpfnConnectEx),&dwBytes,NULL,NULL);     }         DWORD dwSend = 0;     pBuffer->opType = OP_CONNECT ;     strcpy((LPSTR)pBuffer->lpBuffer,"hello kid");     pBuffer->dwBufferSize = 5;     bool b = m_lpfnConnectEx(m_sConnect,(SOCKADDR*)&m_siRemoteAddr,sizeof(m_siRemoteAddr),         pBuffer->lpBuffer,pBuffer->dwBufferSize,&dwSend,& pBuffer->ol);       if(!b && ::WSAGetLastError() != WSA_IO_PENDING)      {          return FALSE;      }        return TRUE;  }   PER_IO_BUFFER* Ciocp::AllocBuffer(DWORD dwSize) {     OutputDebugString(L"Buffer ++ \r\n ");     PER_IO_BUFFER* pBuffer = NULL;     if (dwSize > BUFFER_SIZE)     {         return NULL ;     }           EnterCriticalSection(&m_csBuffersListLock);     if (m_pFreeBuffersList == NULL )     {         // 2) HeapAlloc buffer         pBuffer = (PER_IO_BUFFER*) HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(PER_IO_BUFFER)+ BUFFER_SIZE );     }else     {         // 1) check pFreeBuffersList         pBuffer = m_pFreeBuffersList ;         m_pFreeBuffersList = m_pFreeBuffersList->pNext ;         pBuffer->pNext = 0;         m_dwBuffersCount -- ;     }     LeaveCriticalSection(&m_csBuffersListLock);     //     if (pBuffer!= NULL )     {         pBuffer->dwBufferSize = dwSize ;         pBuffer->lpBuffer =(LPBYTE) (pBuffer+1 );         }     return pBuffer ;       }   unsigned int WINAPI Ciocp::_WorkerThreadProc(LPVOID lpParam) {     Sleep(1000);     Ciocp* pThis = (Ciocp*)lpParam ;     DWORD dwTrans = 0;     DWORD dwKey = 0;     LPOVERLAPPED lpol;     PER_IO_BUFFER* pBuffer = NULL ;     while (pThis->m_bStarted )     {         BOOL bOk = GetQueuedCompletionStatus(pThis->m_hIocp,&dwTrans,&dwKey,&lpol,WSA_INFINITE);         if (dwTrans == -1 )         {             pThis->DecCurWorkCount();             _endthreadex(0);             return 0;         }         pBuffer = CONTAINING_RECORD(lpol,PER_IO_BUFFER,ol);         if (!bOk)         {             if (pBuffer->opType == OP_CONNECT)             {                 DWORD dwError = WSAGetLastError();                 if (dwError != ERROR_IO_PENDING)                 {                                           pThis->PostConnect();                     pThis->ReleaseContext((PER_HANDLE_DATA*)dwKey);                 }else                 {                     OutputDebugString(L"Connect Pending .... ");                 }             }// (pBuffer->opType == OP_CONNECT)               pThis->ReleaseIoBuffer(pBuffer);         }else //(!bOk)         {             pThis->HandleIoOp((PER_HANDLE_DATA*)dwKey,pBuffer,dwTrans);         }     }     pThis->DecCurWorkCount();     return  WSAGetLastError(); }   void Ciocp::CreateWokerThreads() {           for (int i= 0;i< m_dwWorkThreadCount-m_dwCurWorkThreadCount ;i++)     {         unsigned threadid;         _beginthreadex(NULL,0,_WorkerThreadProc,this,0,&threadid);         m_dwCurWorkThreadCount ++ ;     } }   void Ciocp::CreateIocp() {     if (m_hIocp == INVALID_HANDLE_VALUE)     {         m_hIocp = CreateIoCompletionPort(INVALID_HANDLE_VALUE,0,0,0);     } }   void Ciocp::AddSocketToIocp(SOCKET s, PER_HANDLE_DATA* pContext/*=0*/) {     CreateIoCompletionPort((HANDLE)s,m_hIocp,(DWORD)pContext,0); }       BOOL Ciocp::Connect(PNOTIFYPROC pNotifyProc, LPSTR lpstrIp /*= "127.0.0.1"*/,DWORD dwPort/*=443 */) {     m_pNotifyProc = pNotifyProc ;       m_siRemoteAddr.sin_family = AF_INET;     m_siRemoteAddr.sin_port = htons(dwPort);     m_siRemoteAddr.sin_addr.S_un.S_addr = inet_addr(lpstrIp);                   //listen(m_sListen,m_dwMaxConns);       CreateIocp();       m_bStarted = true ;     CreateWokerThreads();             // post accept             return PostConnect();     }   PER_HANDLE_DATA* Ciocp::AllocContext(SOCKET s) {     PER_HANDLE_DATA *pContext = NULL ;     OutputDebugString(L"Context ++ \r\n");             EnterCriticalSection(&m_csContextsListLock);     if (m_pFreeContextsList== NULL )     {         pContext = (PER_HANDLE_DATA*)HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(PER_HANDLE_DATA));     }else     {         pContext = m_pFreeContextsList ;         m_pFreeContextsList = pContext->pNext ;         pContext->pNext = 0;         m_dwContextsCount -- ;     }     LeaveCriticalSection(& m_csContextsListLock);       if (pContext != NULL)     {         pContext->s = s ;         pContext->m_hWriteComplete = CreateEvent(NULL,true,TRUE,NULL);     }     return pContext ; }   void Ciocp::DecCurWorkCount() {     EnterCriticalSection(&m_csWorkLock);     m_dwCurWorkThreadCount -- ;     LeaveCriticalSection(&m_csWorkLock); }       void Ciocp::HandleIoOp(PER_HANDLE_DATA* pContext,PER_IO_BUFFER* pBuffer,DWORD dwTrans) {     EnterCriticalSection(&m_csIoLock);           switch(pBuffer->opType)     {     case OP_ACCEPT:         //OutputDebugString(L"Accept \r\n");         ProcessIoAccept(pContext,pBuffer,dwTrans);         break;     case OP_CONNECT:                   ProcessIoConnect(pContext,pBuffer,dwTrans);           break;     case OP_WRITE:         //OutputDebugString(L"Write \r\n");         ProcessIoWrite(pContext,pBuffer,dwTrans);         break;     case OP_READ:         //OutputDebugString(L"Read \r\n");         ProcessIoRead(pContext,pBuffer,dwTrans);         break;     default:         OutputDebugString(L"HandleIoOp Default... \r\n");         break;     }     // release pBuffer     //ReleaseIoBuffer(pBuffer);       LeaveCriticalSection(&m_csIoLock); }   void Ciocp::ProcessIoRead(PER_HANDLE_DATA* pContext, PER_IO_BUFFER* pBuffer, DWORD dwTrans) {     if (dwTrans ==0 ) // read error     {         NotifyMsg(pContext,pBuffer,NOTIFY_MSG_DISCONNECT);           if (pContext->bConnect) // is connect         {                           PostConnect();                       }else         {           }         ReleaseContext(pContext);         }else     {         //  read ok notify main thread          pBuffer->dwTrans = dwTrans ;         if (pContext->dwBufferOffSet+pBuffer->dwTrans > BUFFER_SIZE_DATA )         {             closesocket(pContext->s);             if (pContext->bConnect)             {                 PostConnect();             }             return ;         }         memcpy(pContext->readBytes+pContext->dwBufferOffSet,pBuffer->lpBuffer,pBuffer->dwTrans);         pContext->dwBufferOffSet+= pBuffer->dwTrans ;           NotifyMsg(pContext,pBuffer,NOTIFY_MSG_READ);         PostRead(pContext);               }       ReleaseIoBuffer(pBuffer);       }   void Ciocp::NotifyMsg(PER_HANDLE_DATA* pContext,PER_IO_BUFFER* pBuffer, DWORD dwMsg) {     if (m_pNotifyProc == NULL )     {         OutputDebugString(L"NotifyMsg m_pNotifyProc is NUll \r\n");     }     if(!IsBadCodePtr((FARPROC)m_pNotifyProc))     {         m_pNotifyProc(pContext,pBuffer,dwMsg);     }else     {         OutputDebugString(L" m_pNotifyProc is badcodeptr \r\n");     } }   void Ciocp::ReleaseContext(PER_HANDLE_DATA* pContext) {     OutputDebugString(L"Context -- \r\n");     EnterCriticalSection(& m_csContextsListLock);     CloseHandle(pContext->m_hWriteComplete);       ZeroMemory(pContext,sizeof(PER_HANDLE_DATA));     if (m_dwContextsCount > m_dwMaxFreeContexts)     {         HeapFree(GetProcessHeap(),0,pContext);         LeaveCriticalSection(& m_csContextsListLock);         return ;     }else     {                   pContext->pNext = m_pFreeContextsList;         m_pFreeContextsList = pContext ;         m_dwContextsCount ++ ;               }     LeaveCriticalSection(& m_csContextsListLock); }   void Ciocp::ReleaseIoBuffer(PER_IO_BUFFER* pBuffer) {     OutputDebugString(L"Buffer -- \r\n");     EnterCriticalSection(& m_csBuffersListLock);     ZeroMemory(pBuffer,sizeof(PER_IO_BUFFER)+pBuffer->dwBufferSize);     if (m_dwBuffersCount > m_dwMaxFreeBuffers)     {         HeapFree(GetProcessHeap(),0,pBuffer);         LeaveCriticalSection(& m_csBuffersListLock);         return ;     }else     {         pBuffer->pNext = m_pFreeBuffersList ;         m_pFreeBuffersList =pBuffer ;         m_dwBuffersCount ++ ;     }     LeaveCriticalSection(& m_csBuffersListLock);   }   void Ciocp::ProcessIoConnect(PER_HANDLE_DATA* pContext, PER_IO_BUFFER* pBuffer, DWORD dwTrans) {     if (dwTrans == 0)     {         NotifyMsg(pContext,pBuffer,NOTIFY_MSG_DISCONNECT);         ReleaseContext(pContext);     }else     {         int nAddrLen = sizeof(SOCKADDR_IN);         getsockname(pContext->s,(SOCKADDR*)&pContext->saddr,&nAddrLen);         SetKeepAlive(pContext->s);         NotifyMsg(pContext,pBuffer,NOTIFY_MSG_CONNECT);         //OutputDebugString(L"Connect \r\n");         PostRead(pContext);     }     ReleaseIoBuffer(pBuffer); }   void Ciocp::Shutdown() {     m_bStarted = false ;       if (m_sListen != INVALID_SOCKET )     {         closesocket(m_sListen);         m_sListen = INVALID_SOCKET ;       }     if (m_sConnect != INVALID_SOCKET)     {         closesocket(m_sConnect);         m_sConnect = INVALID_SOCKET ;     }       while (m_dwCurWorkThreadCount > 0)     {         ::PostQueuedCompletionStatus(m_hIocp, -1, 0, NULL);          Sleep(100);     }       PER_IO_BUFFER* pBuffer = m_pFreeBuffersList ;     while(pBuffer)     {         m_pFreeBuffersList = pBuffer->pNext ;         HeapFree(GetProcessHeap(),0,pBuffer);         pBuffer = m_pFreeBuffersList ;     }     m_dwBuffersCount = 0;     PER_HANDLE_DATA* pContext = m_pFreeContextsList ;     while(pContext)     {         m_pFreeContextsList = pContext->pNext ;         HeapFree(GetProcessHeap(),0,pContext);         pContext = m_pFreeContextsList ;     }     m_dwContextsCount = 0 ;             }   void Ciocp::ProcessIoAccept(PER_HANDLE_DATA* pContext, PER_IO_BUFFER* pBuffer, DWORD dwTrans) {       LPSOCKADDR lpLocalAddr,lpRemoteAddr;     int nLocalAddr,nRemoteAddr;     DWORD dwAddrSize = sizeof(SOCKADDR_IN)+16 ;       PER_HANDLE_DATA* pContext1 = AllocContext(pBuffer->sClient);       m_lpfnGetAcceptExSockAddrs(pBuffer->lpBuffer,pBuffer->dwBufferSize- 2*dwAddrSize,dwAddrSize,dwAddrSize,&lpLocalAddr,&nLocalAddr,&lpRemoteAddr,&nRemoteAddr);     memcpy(& (pContext1->saddr),lpRemoteAddr,nRemoteAddr);         SetKeepAlive(pBuffer->sClient);       AddSocketToIocp(pBuffer->sClient,pContext1);       NotifyMsg(pContext1,pBuffer,NOTIFY_MSG_ACCEPT);       PostRead(pContext1);       PostAccept();       ReleaseIoBuffer(pBuffer); }   BOOL Ciocp::SetKeepAlive(SOCKET s) {     BOOL bKeepAlive = TRUE;      int nRet = ::setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (char*)&bKeepAlive, sizeof(bKeepAlive));      if (nRet == SOCKET_ERROR)     {         return false ;     }else     {         tcp_keepalive alive_in = {0};         tcp_keepalive alive_out = {0};           alive_in.keepalivetime = 5000;         alive_in.keepaliveinterval = 1000;         alive_in.onoff = TRUE ;         unsigned long ulBytesReturn = 0 ;         nRet = WSAIoctl(s,SIO_KEEPALIVE_VALS,&alive_in,sizeof(alive_in),&alive_out,sizeof(alive_out),&ulBytesReturn,NULL,NULL);         if (nRet == SOCKET_ERROR)         {             return FALSE ;         }       }       return TRUE ; }   void Ciocp::GetStatisticsData(ULONGLONG* pulRead,ULONGLONG* pulWrite) {     *pulWrite = m_ulWriteBytes ;     *pulRead = m_ulReadBytes ; }   void Ciocp::Send(PER_HANDLE_DATA* pContext,LPBYTE lpBuffer,DWORD dwSize) {     WaitForSingleObject(pContext->m_hWriteComplete,INFINITE);     PostWrite(pContext,lpBuffer,dwSize); }   void Ciocp::ProcessIoWrite(PER_HANDLE_DATA* pContext, PER_IO_BUFFER* pBuffer, DWORD dwTrans) {     if (dwTrans == 0)     {         NotifyMsg(pContext,pBuffer,NOTIFY_MSG_DISCONNECT);           if (pContext->bConnect) // is connect         {               PostConnect();           }else         {           }         ReleaseContext(pContext);     }     else     {         SetEvent(pContext->m_hWriteComplete);     }       ReleaseIoBuffer(pBuffer); }

　　

 IOCP - UDP

 

//NOTE
// 
//This code taken from Mr. Bob Quinn's article 
//titled 'Internet Multicasting'
//published in Dr. Dobb's Journal dated Oct 1997

//I have modified the original code to illustrate 
//the use I/O completion ports with UDP.

//If you have any comments email me : shapall@hotmail.com

#include "StdAfx.h"
#include <winsock2.h>
#include <ws2tcpip.h>
#include "Stdio.h"

#define BUFSIZE 1024 //max size of incoming data buffer
#define MAXADDRSTR 16

#define DEFAULT_GROUP_ADDRESS "239.254.1.2"
#define DEFAULT_PORT 7125 

LONG nCount = 0;
HANDLE g_hCompletionPort;
DWORD WINAPI WorkerThread( LPVOID WorkContext );

BOOL HandleIncomingData( UCHAR* pBuf);
BOOL CreateNetConnections( VOID );
BOOL CreateWorkers( UINT );
void InitWinsock2();
void UnInitWinsock2();

HANDLE g_hReadEvent;
SOCKET g_hSocket;
UCHAR achInBuf [BUFSIZE];
char achMCAddr[MAXADDRSTR] = DEFAULT_GROUP_ADDRESS;
u_short nPort = DEFAULT_PORT;


OVERLAPPED Overlapped;

//-----------------------------------------------------------------
void InitWinsock2()
{
    WSADATA data;
    WORD version; 
    int ret = 0;  

    version = (MAKEWORD(2, 2)); 
    ret = WSAStartup(version, &data); 
    if (ret != 0) 
    {  
        ret = WSAGetLastError(); 
        
        if (ret == WSANOTINITIALISED) 
        {  
            printf("not initialised"); 
        }
    }
}

//-----------------------------------------------------------------
void UnInitWinsock2()
{ 
    WSACleanup();
}

//-----------------------------------------------------------------
BOOL CreateNetConnections (void)
{ 
    DWORD nbytes; 
    BOOL b; 
    BOOL fFlag = TRUE; 
    int nRet=0; 
    
    SOCKADDR_IN stLclAddr;  
    struct ip_mreq stMreq; // Multicast interface structure  

    // Get a datagram socket  
    g_hSocket = socket(AF_INET, SOCK_DGRAM,0); 
    
    if (g_hSocket == INVALID_SOCKET)  
    { 
        printf ("socket() failed, Err: %d\n", WSAGetLastError()); 
        return FALSE;  
    }  

    nRet = setsockopt(g_hSocket,SOL_SOCKET,
               SO_REUSEADDR, (char *)&fFlag, sizeof(fFlag));  
    if (nRet == SOCKET_ERROR)  
    { 
        printf ("setsockopt() SO_REUSEADDR failed, 
                          Err: %d\n",WSAGetLastError()); 
    } 

    // Name the socket (assign the local port number to receive on)  
    stLclAddr.sin_family = AF_INET; 
    stLclAddr.sin_addr.s_addr = htonl(INADDR_ANY); 
    stLclAddr.sin_port = htons(nPort); 

    nRet = bind(g_hSocket,(struct sockaddr*) &stLclAddr,sizeof(stLclAddr)); 
    if (nRet == SOCKET_ERROR)  
    { 
        printf ("bind() port: %d failed, Err: %d\n", 
                                nPort,WSAGetLastError()); 
    } 
    // Join the multicast group so we can receive from it  
    stMreq.imr_multiaddr.s_addr = inet_addr(achMCAddr); 
    stMreq.imr_interface.s_addr = INADDR_ANY; 
    nRet = setsockopt(g_hSocket,IPPROTO_IP, 
               IP_ADD_MEMBERSHIP,(char *)&stMreq,sizeof(stMreq)); 

    if (nRet == SOCKET_ERROR)  
    { 
        printf("setsockopt() IP_ADD_MEMBERSHIP address %s failed, 
                             Err: %d\n",achMCAddr,
                             WSAGetLastError()); 
    }

    //
    //note the 10 says how many concurrent cpu bound threads to allow thru 
    //this should be tunable based on the requests. CPU bound requests will 
    // really really honor this. 
    // 

    g_hCompletionPort = CreateIoCompletionPort (INVALID_HANDLE_VALUE,
                                                              NULL,0,3); 
    if (!g_hCompletionPort) 
    { 
        fprintf (stdout, "g_hCompletionPort Create Failed\n"); 
        return FALSE; 
    } 
    //Associate this socket to this I/O completion port 
    CreateIoCompletionPort((HANDLE)g_hSocket,g_hCompletionPort,
                                             (DWORD)g_hSocket,3);  

    //
    // Start off an asynchronous read on the socket.  
    //  
    Overlapped.hEvent = g_hReadEvent;  
    Overlapped.Internal = 0;  
    Overlapped.InternalHigh = 0;  
    Overlapped.Offset = 0;  
    Overlapped.OffsetHigh = 0;  
    b = ReadFile ((HANDLE)g_hSocket,&achInBuf,
               sizeof(achInBuf),&nbytes,&Overlapped);  
    
    if (!b && GetLastError () != ERROR_IO_PENDING)  
    {  
        fprintf (stdout, "ReadFile Failed\n");  
        return FALSE;  
    }  
    
    return TRUE;
}
//-----------------------------------------------------------------

BOOL CreateWorkers (UINT dwNumberOfWorkers)
{ 
    DWORD ThreadId; 
    HANDLE ThreadHandle; 
    DWORD i; 

    for (i = 0; i < dwNumberOfWorkers; i++) 
    { 
        ThreadHandle = CreateThread (NULL,0,
                  WorkerThread,NULL,0,&ThreadId); 
        if (!ThreadHandle) 
        { 
            fprintf (stdout, "Create Worker Thread Failed\n"); 
            return FALSE;
        } 
               
        CloseHandle (ThreadHandle); 
    } 
    return TRUE;
}

//-----------------------------------------------------------------
DWORD WINAPI WorkerThread (LPVOID WorkContext)
{ 
    DWORD nSocket; 
    BOOL b; 
    OVERLAPPED ovl; 
    LPOVERLAPPED lpo=&ovl; 
    DWORD nBytesRead=0; 
    DWORD nBytesToBeRead; 
    UCHAR ReadBuffer[BUFSIZE]; 
    LPVOID lpMsgBuf; 

    memset(&ReadBuffer,0,BUFSIZE); 
    for (;;) 
    { 
        b = GetQueuedCompletionStatus(g_hCompletionPort,
                    &nBytesToBeRead,&nSocket,&lpo,INFINITE); 
        if (b || lpo) 
        { 
            if (b) 
            { 
                // 
                // Determine how long a response was desired by the client. 
                // 
                
                OVERLAPPED ol; 
                ol.hEvent = g_hReadEvent; 
                ol.Offset = 0; 
                ol.OffsetHigh = 0; 

                b = ReadFile ((HANDLE)nSocket,&ReadBuffer,
                                nBytesToBeRead,&nBytesRead,&ol); 
                if (!b )  
                { 
                    DWORD dwErrCode = GetLastError(); 
                    if( dwErrCode != ERROR_IO_PENDING ) 
                    { 
                        // something has gone wrong here... 
                        printf("Something has gone 
                               wrong:Error code - %d\n",dwErrCode ); 

                        FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | 
                               FORMAT_MESSAGE_FROM_SYSTEM | 
                               FORMAT_MESSAGE_IGNORE_INSERTS, 
                               NULL, dwErrCode, 
                               MAKELANGID(LANG_NEUTRAL, 
                                    SUBLANG_DEFAULT),// Default language
                               (LPTSTR) &lpMsgBuf, 0, NULL); 

                        OutputDebugString((LPCTSTR)lpMsgBuf); 
                        //Free the buffer. 

                        LocalFree(lpMsgBuf ); 
                    } 
                    else if( dwErrCode == ERROR_IO_PENDING ) 
                    {
                        // I had to do this for my UDP sample 
                        //Never did for my TCP servers 
                        WaitForSingleObject(ol.hEvent,INFINITE); 

                        HandleIncomingData(ReadBuffer); 
                    } 
                } 
                else 
                { 
                    HandleIncomingData(ReadBuffer); 
                } 
                continue; 
            } 
            else 
            { 
                fprintf (stdout, "WorkThread Wait Failed\n"); 
                //exit (1); 
            } 
        } 
        return 1; 
    } 
} 
//-----------------------------------------------------------------
BOOL HandleIncomingData( UCHAR* pBuf)
{ 
    InterlockedIncrement(&nCount); 
    SYSTEMTIME *lpstSysTime; 

    lpstSysTime = (SYSTEMTIME *)(pBuf); 
    printf("[%d]UTC Time %02d:%02d:%02d:%03d on %02d-%02d-%d \n",nCount, 
                lpstSysTime->wHour, lpstSysTime->wMinute, 
                lpstSysTime->wSecond, lpstSysTime->wMilliseconds, 
                lpstSysTime->wMonth, lpstSysTime->wDay, lpstSysTime->wYear); 
                memset(&pBuf,0,BUFSIZE); 
                //just making sure that i am not showing stale data 

    return TRUE; 
} 
//-----------------------------------------------------------------
main () 
{ 
    //You can modify your program to take some arguments for port number 
    //and multicast group address here 
    
    printf("\n***************************************\n"); 
    printf("Group IP address: %s\n",achMCAddr); 
    printf("Port number : %d\n",nPort); 
    printf("\n***************************************\n"); 

    //Initialize winsock 2 
    InitWinsock2(); 

    //We want to keep the main thread running 
    HANDLE hWait2Exit = CreateEvent(NULL,FALSE,TRUE,"MCLIENT"); 
    ResetEvent(hWait2Exit ); 

    //This OVERLAPPED event 
    g_hReadEvent = CreateEvent(NULL,TRUE,TRUE,NULL); 

    // 
    // try to get timing more accurate... Avoid context 
    // switch that could occur when threads are released 
    // 

    SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL); 
    if (!CreateNetConnections ()) 
    { 
        printf("Error condition @ CreateNetConnections , exiting\n"); 
        return 1; 
    } 

    if (!CreateWorkers (5)) 
    { 
        printf("Error condition @CreateWorkers, exiting\n"); 
        return 1; 
    } 
    
    WaitForSingleObject(hWait2Exit,INFINITE); 
    UnInitWinsock2(); 
    return 1; 
}

转 实现UDP IOCP心得-zt

 http://www.cnblogs.com/BeginGame/archive/2011/09/18/2180241.html