Winsock IOCP模型(二)

最新推荐文章于 2023-05-08 21:51:10 发布

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本文介绍了一个使用IOCP实现的并发服务器程序，该程序能够处理客户端连接请求，并通过多线程处理读写操作。服务器使用WSAAsyncSelect进行异步套接字通信，通过AcceptEx函数接受新的客户端连接。

// IOCP2.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <WinSock2.h> #include <MSWSock.h> #include <Windows.h> #include <process.h> #pragma comment(lib, "WS2_32.lib") #define MAX_BUFFER 256 #define MAX_TIMEOUT 1000 #define MAX_SOCKET 1024 #define MAX_THREAD 64 #define MAX_ACCEPT 5 typedef enum _OPERATION_INFO_ { OP_NULL, OP_ACCEPT, OP_READ, OP_WRITE }OPERATIONINFO; typedef struct _PER_HANDLE_DATA_ { public: _PER_HANDLE_DATA_() { clean(); } ~_PER_HANDLE_DATA_() { clean(); } protected: void clean() { sock = INVALID_SOCKET; memset(&addr, 0, sizeof(addr)); addr.sin_addr.S_un.S_addr = INADDR_ANY; addr.sin_port = htons(0); addr.sin_family = AF_INET; } public: SOCKET sock; SOCKADDR_IN addr; }PERHANDLEDATA, *PPERHANDLEDATA; typedef struct _PER_IO_DTATA_ { public: _PER_IO_DTATA_() { clean(); } ~_PER_IO_DTATA_() { clean(); } void clean() { ZeroMemory(&ol, sizeof(ol)); memset(buf, 0, sizeof(buf)); sAccept = INVALID_SOCKET; sListen = INVALID_SOCKET; wsaBuf.buf = buf; wsaBuf.len = MAX_BUFFER; opType = OP_NULL; } public: WSAOVERLAPPED ol; SOCKET sAccept; // Only valid with AcceptEx SOCKET sListen; // Only valid with AcceptEx WSABUF wsaBuf; char buf[MAX_BUFFER]; OPERATIONINFO opType; }PERIODATA, *PPERIODATA; HANDLE hThread[MAX_THREAD] = {0}; PERIODATA* pAcceptData[MAX_ACCEPT] = {0}; int g_nThread = 0; BOOL g_bExitThread = FALSE; LPFN_ACCEPTEX lpfnAcceptEx = NULL; LPFN_GETACCEPTEXSOCKADDRS lpfnGetAcceptExSockAddrs = NULL; GUID GuidAcceptEx = WSAID_ACCEPTEX; GUID GuidGetAcceptExSockAddrs = WSAID_GETACCEPTEXSOCKADDRS; unsigned __stdcall ThreadProc(LPVOID lParam); BOOL PostAccept(PERIODATA* pIoData); int _tmain(int argc, _TCHAR* argv[]) { WORD wVersionRequested = MAKEWORD(2, 2); WSADATA wsaData; if(0 != WSAStartup(wVersionRequested, &wsaData)) { printf("WSAStartup failed with error code: %d/n", GetLastError()); return EXIT_FAILURE; } if(2 != HIBYTE(wsaData.wVersion) || 2 != LOBYTE(wsaData.wVersion)) { printf("Socket version not supported./n"); WSACleanup(); return EXIT_FAILURE; } // Create IOCP HANDLE hIOCP = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, NULL, 0); if(NULL == hIOCP) { printf("CreateIoCompletionPort failed with error code: %d/n", WSAGetLastError()); WSACleanup(); return EXIT_FAILURE; } // Create worker thread SYSTEM_INFO si = {0}; GetSystemInfo(&si); for(int i = 0; i < (int)si.dwNumberOfProcessors+2; i++) { hThread[g_nThread] = (HANDLE)_beginthreadex(NULL, 0, ThreadProc, (LPVOID)hIOCP, 0, NULL); if(NULL == hThread[g_nThread]) { printf("_beginthreadex failed with error code: %d/n", GetLastError()); continue; } ++g_nThread; if(g_nThread > MAX_THREAD) { break; } } // Create listen SOCKET SOCKET sListen = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED); if(INVALID_SOCKET == sListen) { printf("WSASocket failed with error code: %d/n", WSAGetLastError()); goto EXIT_CODE; } // Associate SOCKET with IOCP if(NULL == CreateIoCompletionPort((HANDLE)sListen, hIOCP, NULL, 0)) { printf("CreateIoCompletionPort failed with error code: %d/n", WSAGetLastError()); if(INVALID_SOCKET != sListen) { closesocket(sListen); sListen = INVALID_SOCKET; } goto EXIT_CODE; } // Bind SOCKET SOCKADDR_IN addr; memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); addr.sin_port = htons(5050); if(SOCKET_ERROR == bind(sListen, (LPSOCKADDR)&addr, sizeof(addr))) { printf("bind failed with error code: %d/n", WSAGetLastError()); if(INVALID_SOCKET != sListen) { closesocket(sListen); sListen = INVALID_SOCKET; } goto EXIT_CODE; } // Start Listen if(SOCKET_ERROR == listen(sListen, 200)) { printf("listen failed with error code: %d/n", WSAGetLastError()); if(INVALID_SOCKET != sListen) { closesocket(sListen); sListen = INVALID_SOCKET; } goto EXIT_CODE; } printf("Server start, wait for client to connect .../n"); DWORD dwBytes = 0; if(SOCKET_ERROR == WSAIoctl(sListen, SIO_GET_EXTENSION_FUNCTION_POINTER, &GuidAcceptEx, sizeof(GuidAcceptEx), &lpfnAcceptEx, sizeof(lpfnAcceptEx), &dwBytes, NULL, NULL)) { printf("WSAIoctl failed with error code: %d/n", WSAGetLastError()); if(INVALID_SOCKET != sListen) { closesocket(sListen); sListen = INVALID_SOCKET; } goto EXIT_CODE; } if(SOCKET_ERROR == WSAIoctl(sListen, SIO_GET_EXTENSION_FUNCTION_POINTER, &GuidGetAcceptExSockAddrs, sizeof(GuidGetAcceptExSockAddrs), &lpfnGetAcceptExSockAddrs, sizeof(lpfnGetAcceptExSockAddrs), &dwBytes, NULL, NULL)) { printf("WSAIoctl failed with error code: %d/n", WSAGetLastError()); if(INVALID_SOCKET != sListen) { closesocket(sListen); sListen = INVALID_SOCKET; } goto EXIT_CODE; } // Post MAX_ACCEPT accept for(int i=0; i<MAX_ACCEPT; i++) { pAcceptData[i] = new PERIODATA; pAcceptData[i]->sListen = sListen; PostAccept(pAcceptData[i]); } // After 1 hour later, Server shutdown. Sleep(1000 * 60 *60); EXIT_CODE: g_bExitThread = TRUE; PostQueuedCompletionStatus(hIOCP, 0, NULL, NULL); WaitForMultipleObjects(g_nThread, hThread, TRUE, INFINITE); for(int i = 0; i < g_nThread; i++) { CloseHandle(hThread[g_nThread]); } for(int i=0; i<MAX_ACCEPT; i++) { if(pAcceptData[i]) { delete pAcceptData[i]; pAcceptData[i] = NULL; } } if(INVALID_SOCKET != sListen) { closesocket(sListen); sListen = INVALID_SOCKET; } CloseHandle(hIOCP); // Close IOCP WSACleanup(); return 0; } BOOL PostAccept(PERIODATA* pIoData) { if(INVALID_SOCKET == pIoData->sListen) { return FALSE; } DWORD dwBytes = 0; pIoData->opType = OP_ACCEPT; pIoData->sAccept = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED); if(INVALID_SOCKET == pIoData->sAccept) { printf("WSASocket failed with error code: %d/n", WSAGetLastError()); return FALSE; } if(FALSE == lpfnAcceptEx(pIoData->sListen, pIoData->sAccept, pIoData->wsaBuf.buf, pIoData->wsaBuf.len - ((sizeof(SOCKADDR_IN)+16)*2), sizeof(SOCKADDR_IN)+16, sizeof(SOCKADDR_IN)+16, &dwBytes, &(pIoData->ol))) { if(WSA_IO_PENDING != WSAGetLastError()) { printf("lpfnAcceptEx failed with error code: %d/n", WSAGetLastError()); return FALSE; } } return TRUE; } unsigned __stdcall ThreadProc(LPVOID lParam) { HANDLE hIOCP = (HANDLE)lParam; PERHANDLEDATA* pPerHandleData = NULL; PERIODATA* pPerIoData = NULL; WSAOVERLAPPED* lpOverlapped = NULL; DWORD dwTrans = 0; DWORD dwFlags = 0; while(!g_bExitThread) { BOOL bRet = GetQueuedCompletionStatus(hIOCP, &dwTrans, (PULONG_PTR)&pPerHandleData, &lpOverlapped, MAX_TIMEOUT); if(!bRet) { // Timeout and exit thread if(WAIT_TIMEOUT == GetLastError()) { continue; } // Error printf("GetQueuedCompletionStatus failed with error: %d/n", GetLastError()); continue; } else { pPerIoData = CONTAINING_RECORD(lpOverlapped, PERIODATA, ol); if(NULL == pPerIoData) { // Exit thread break; } if((0 == dwTrans) && (OP_READ == pPerIoData->opType || OP_WRITE == pPerIoData->opType)) { // Client leave. printf("Client: <%s : %d> leave./n", inet_ntoa(pPerHandleData->addr.sin_addr), ntohs(pPerHandleData->addr.sin_port)); closesocket(pPerHandleData->sock); delete pPerHandleData; delete pPerIoData; continue; } else { switch(pPerIoData->opType) { case OP_ACCEPT: // Accept { SOCKADDR_IN* remote = NULL; SOCKADDR_IN* local = NULL; int remoteLen = sizeof(SOCKADDR_IN); int localLen = sizeof(SOCKADDR_IN); lpfnGetAcceptExSockAddrs(pPerIoData->wsaBuf.buf, pPerIoData->wsaBuf.len - ((sizeof(SOCKADDR_IN)+16)*2), sizeof(SOCKADDR_IN)+16, sizeof(SOCKADDR_IN)+16, (LPSOCKADDR*)&local, &localLen, (LPSOCKADDR*)&remote, &remoteLen); printf("Client <%s : %d> come in./n", inet_ntoa(remote->sin_addr), ntohs(remote->sin_port)); printf("Recv Data: <%s : %d> %s./n", inet_ntoa(remote->sin_addr), ntohs(remote->sin_port), pPerIoData->wsaBuf.buf); if(NULL != pPerHandleData) { delete pPerHandleData; pPerHandleData = NULL; } pPerHandleData = new PERHANDLEDATA; pPerHandleData->sock = pPerIoData->sAccept; PERHANDLEDATA* pPerHandle = new PERHANDLEDATA; pPerHandle->sock = pPerIoData->sAccept; PERIODATA* pPerIo = new PERIODATA; pPerIo->opType = OP_WRITE; strcpy_s(pPerIo->buf, MAX_BUFFER, pPerIoData->buf); DWORD dwTrans = strlen(pPerIo->buf); memcpy(&(pPerHandleData->addr), remote, sizeof(SOCKADDR_IN)); // Associate with IOCP if(NULL == CreateIoCompletionPort((HANDLE)(pPerHandleData->sock), hIOCP, (ULONG_PTR)pPerHandleData, 0)) { printf("CreateIoCompletionPort failed with error code: %d/n", GetLastError()); closesocket(pPerHandleData->sock); delete pPerHandleData; continue; } // Post Accept memset(&(pPerIoData->ol), 0, sizeof(pPerIoData->ol)); PostAccept(pPerIoData); // Post Receive DWORD dwFlags = 0; if(SOCKET_ERROR == WSASend(pPerHandle->sock, &(pPerIo->wsaBuf), 1, &dwTrans, dwFlags, &(pPerIo->ol), NULL)) { if(WSA_IO_PENDING != WSAGetLastError()) { printf("WSASend failed with error code: %d/n", WSAGetLastError()); closesocket(pPerHandle->sock); delete pPerHandle; delete pPerIo; continue; } } } break; case OP_READ: // Read printf("recv client <%s : %d> data: %s/n", inet_ntoa(pPerHandleData->addr.sin_addr), ntohs(pPerHandleData->addr.sin_port), pPerIoData->buf); pPerIoData->opType = OP_WRITE; memset(&(pPerIoData->ol), 0, sizeof(pPerIoData->ol)); if(SOCKET_ERROR == WSASend(pPerHandleData->sock, &(pPerIoData->wsaBuf), 1, &dwTrans, dwFlags, &(pPerIoData->ol), NULL)) { if(WSA_IO_PENDING != WSAGetLastError()) { printf("WSASend failed with error code: %d./n", WSAGetLastError()); continue; } } break; case OP_WRITE: // Write { pPerIoData->opType = OP_READ; dwFlags = 0; memset(&(pPerIoData->ol), 0, sizeof(pPerIoData->ol)); memset(pPerIoData->buf, 0, sizeof(pPerIoData->buf)); pPerIoData->wsaBuf.buf = pPerIoData->buf; dwTrans = pPerIoData->wsaBuf.len = MAX_BUFFER; if(SOCKET_ERROR == WSARecv(pPerHandleData->sock, &(pPerIoData->wsaBuf), 1, &dwTrans, &dwFlags, &(pPerIoData->ol), NULL)) { if(WSA_IO_PENDING != WSAGetLastError()) { printf("WSARecv failed with error code: %d./n", WSAGetLastError()); continue; } } } break; default: break; } } } } return 0; }