qotd.c

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/*
 * PROJECT:     ReactOS simple TCP/IP services
 * LICENSE:     GPL - See COPYING in the top level directory
 * FILE:        base/services/tcpsvcs/qotd.c
 * PURPOSE:     Sends a random quote to the client
 * COPYRIGHT:   Copyright 2005 - 2008 Ged Murphy <gedmurphy@reactos.org>
 *
 */

#include "tcpsvcs.h"

#include <stdlib.h>

static WCHAR szFilePath[] = L"\\drivers\\etc\\quotes";

static BOOL
SendQuote(SOCKET sock, char* Quote)
{
    INT strSize = strlen(Quote);
    if (send(sock, Quote, strSize, 0) == SOCKET_ERROR)
        return FALSE;

    return TRUE;
}

static BOOL
RetrieveQuote(SOCKET sock)
{
    HANDLE hFile;
    WCHAR szFullPath[MAX_PATH + 20];
    DWORD dwBytesRead;
    LPSTR lpQuotes;
    LPSTR lpStr;
    INT quoteNum;
    INT NumQuotes = 0;
    INT i;

    if(!GetSystemDirectoryW(szFullPath, MAX_PATH))
    {
        LogEvent(L"QOTD: Getting system path failed", GetLastError(), 0, LOG_FILE);
        return FALSE;
    }
    wcscat(szFullPath, szFilePath);


    LogEvent(L"QOTD: Opening quotes file", 0, 0, LOG_FILE);
    hFile = CreateFileW(szFullPath,
                        GENERIC_READ,
                        0,
                        NULL,
                        OPEN_EXISTING,
                        FILE_ATTRIBUTE_NORMAL,
                        NULL);
    if (hFile == INVALID_HANDLE_VALUE)
    {
        LogEvent(L"QOTD: Error opening quotes file", GetLastError(), 0, LOG_FILE);
    }
    else
    {
        DWORD dwSize = GetFileSize(hFile, NULL);
        lpQuotes = (LPSTR)HeapAlloc(GetProcessHeap(), 0, dwSize + 1);
        if (!lpQuotes) 
        {
            CloseHandle(hFile);
            return FALSE;
        }

        ReadFile(hFile,
                 lpQuotes,
                 dwSize,
                 &dwBytesRead,
                 NULL);
        CloseHandle(hFile);

        lpQuotes[dwSize] = 0;

        if (dwBytesRead != dwSize)
        {
            HeapFree(GetProcessHeap(), 0, lpQuotes);
            return FALSE;
        }

        lpStr = lpQuotes;
        while (*lpStr)
        {
            if (*lpStr == '%')
                NumQuotes++;
            lpStr++;
        }

        /* pick a random quote */
        srand((unsigned int) GetTickCount());
        quoteNum = rand() % NumQuotes;

        /* retrieve the full quote */
        lpStr = lpQuotes;
        for (i = 1; i <= quoteNum; i++)
        {
            /* move past preceding quote */
            lpStr++;

            if (i == quoteNum)
            {
                LPSTR lpStart = lpStr;

                while (*lpStr != '%' && *lpStr != '\0')
                    lpStr++;

                *lpStr = 0;

                /* send the quote */
                if (!SendQuote(sock, lpStart))
                    LogEvent(L"QOTD: Error sending data", 0, 0, LOG_FILE);
                break;
            }
            else
            {
                while (*lpStr != '%' && *lpStr != '\0')
                    lpStr++;

                /* move past % and RN */
                lpStr += 2;
            }
        }

        HeapFree(GetProcessHeap(), 0, lpQuotes);
        return TRUE;
    }

    return FALSE;
}


DWORD WINAPI
QotdHandler(VOID* sock_)
{
    SOCKET sock = (SOCKET)sock_;
    DWORD retVal = 0;

    if (!RetrieveQuote(sock))
    {
        LogEvent(L"QOTD: Error retrieving quote", 0, 0, LOG_FILE);
        retVal = 1;
    }

    LogEvent(L"QOTD: Shutting connection down", 0, 0, LOG_FILE);
    if (ShutdownConnection(sock, FALSE))
    {
        LogEvent(L"QOTD: Connection is down", 0, 0, LOG_FILE);
    }
    else
    {
        LogEvent(L"QOTD: Connection shutdown failed", 0, 0, LOG_FILE);
        LogEvent(L"QOTD: Terminating thread", 0, 0, LOG_FILE);
        retVal = 1;
    }

    LogEvent(L"QOTD: Terminating thread", 0, 0, LOG_FILE);
    ExitThread(retVal);
}