// IOCP.cpp : Defines the entry point for the console application.
//
//

#include "stdafx.h"

#include
#include
#include
#pragma comment(lib, "WS2_32.lib")

#define MAX_BUFFER 256
#define MAX_TIMEOUT 1000
#define MAX_SOCKET 1024
#define MAX_THREAD 64

typedef enum _OPERATION_INFO_
{
OP_NULL,
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();
}
private:
void clean()
{
ZeroMemory(&ol, sizeof(ol));
memset(buf, 0, sizeof(buf));
wsaBuf.buf = buf;
wsaBuf.len = MAX_BUFFER;
opType = OP_NULL;
}
public:
WSAOVERLAPPED ol;
WSABUF wsaBuf;
char buf[MAX_BUFFER];
OPERATIONINFO opType;
}PERIODATA, *PPERIODATA;

HANDLE hThread[MAX_THREAD] = {0};
int g_nThread = 0;
BOOL g_bExitThread = FALSE;

unsigned __stdcall ThreadProc(LPVOID lParam);

int _tmain(int argc, _TCHAR* argv[])
{
WSADATA wsaData;
if(0 != WSAStartup(MAKEWORD(2, 2), &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 I/O Completion Port  
HANDLE hIOCP = CreateIoCompletionPort(INVALID\_HANDLE\_VALUE, NULL, NULL, 0);  
if(NULL == hIOCP)  
{  
    printf("CreateIoCompletionPort failed with error code: %d/n", GetLastError());  
    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 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;  
}  
SOCKADDR\_IN addr;  
memset(&addr, 0, sizeof(addr));  
addr.sin\_addr.S\_un.S\_addr = inet\_addr("127.0.0.1");  
addr.sin\_family = AF\_INET;  
addr.sin\_port = htons(5050);  
if(SOCKET\_ERROR == bind(sListen, (LPSOCKADDR)&addr, sizeof(addr)))  
{  
    printf("bind failed with error code: %d/n", WSAGetLastError());  
    closesocket(sListen);  
    sListen = INVALID\_SOCKET;  
    goto EXIT\_CODE;  
}  
if(SOCKET\_ERROR == listen(sListen, 5))  
{  
    printf("listen failed with error code: %d/n", WSAGetLastError());  
    closesocket(sListen);  
    sListen = INVALID\_SOCKET;  
    goto EXIT\_CODE;  
}

printf("Server start, wait for client to connect .../n");  
while(TRUE)  
{  
    SOCKADDR\_IN remote;  
    memset(&remote, 0, sizeof(remote));  
    int len = sizeof(remote);

    SOCKET sNew = WSAAccept(sListen, (LPSOCKADDR)&remote, &len, NULL, NULL);  
    if(INVALID\_SOCKET == sNew)  
    {  
        printf("WSAAccept failed with error code: %d/n", WSAGetLastError());  
        continue;  
    }  
    printf("Client <%s : %d> come in./n", inet\_ntoa(remote.sin\_addr), ntohs(remote.sin\_port));  
    PERHANDLEDATA\* pPerHandleData = new PERHANDLEDATA;  
    pPerHandleData->sock = sNew;  
    memcpy(&(pPerHandleData->addr), &remote, sizeof(remote));  
    // 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 Receive  
    PERIODATA\* pPerIoData = new PERIODATA;  
    pPerIoData->opType = OP\_READ;  
    DWORD dwTrans = pPerIoData->wsaBuf.len;  
    DWORD dwFlags = 0;  
    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());  
            closesocket(pPerHandleData->sock);  
            delete pPerHandleData;  
            delete pPerIoData;  
            continue;  
        }  
    }  
}  
closesocket(sListen);  
sListen = INVALID\_SOCKET;

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]);
}
CloseHandle(hIOCP); // Close IOCP
WSACleanup();
return 0;
}

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, INFINITE);  
    if(!bRet)  
    {  
        printf("GetQueuedCompletionStatus failed with error: %d/n", WSAGetLastError());  
        continue;  
    }  
    else  
    {  
        pPerIoData = CONTAINING\_RECORD(lpOverlapped, PERIODATA, ol);  
        if(0 == dwTrans)  
        {  
            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\_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:  
                {  
                    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;  

}