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121 lines
2.8 KiB
C
121 lines
2.8 KiB
C
/*
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* PROJECT: ReactOS simple TCP/IP services
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: base/services/tcpsvcs/chargen.c
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* PURPOSE: Sends continuous lines of chars to the client
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* COPYRIGHT: Copyright 2005 - 2008 Ged Murphy <gedmurphy@reactos.org>
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*
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*/
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#include "tcpsvcs.h"
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/* printable ASCII's characters for chargen */
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#define ASCII_START 32
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#define ASCII_END 126
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#define NUM_CHARS ASCII_END - ASCII_START + 1
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/* number of chars to put on a line */
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#define LINESIZE 74 // 72 + CR + NL
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static BOOL
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SendLine(SOCKET sock, LPSTR lpLine)
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{
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BOOL bRet = FALSE;
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/*FIXME: need to establish if peer closes connection, not just report a socket error */
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INT retVal = send(sock, lpLine, LINESIZE, 0);
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if (retVal > 0)
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{
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if (retVal == LINESIZE)
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{
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bRet = TRUE;
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}
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else
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{
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LogEvent(L"Chargen: Not sent enough bytes", 0, 0, LOG_FILE);
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}
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}
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else if (retVal == SOCKET_ERROR)
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{
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LogEvent(L"Chargen: Socket error\n", WSAGetLastError(), 0, LOG_ERROR);
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}
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else
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{
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LogEvent(L"Chargen: unknown error\n", WSAGetLastError(), 0, LOG_ERROR);
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}
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return bRet;
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}
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static BOOL
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GenerateChars(SOCKET sock)
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{
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CHAR chars[NUM_CHARS];
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CHAR line[LINESIZE];
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INT charIndex;
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INT loopIndex;
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INT i;
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/* fill the array with printable characters */
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for (charIndex = 0, i = ASCII_START; i <= ASCII_END; charIndex++, i++)
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chars[charIndex] = (CHAR)i;
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loopIndex = 0;
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while (!bShutdown)
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{
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/* reset the loop when we hit the last char */
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if (loopIndex == NUM_CHARS)
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loopIndex = 0;
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/* fill a line array to send */
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charIndex = loopIndex;
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for (i=0; i < LINESIZE - 2; i++)
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{
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line[i] = chars[charIndex];
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/* if we hit the end char, reset it */
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if (chars[charIndex] == chars[NUM_CHARS - 1])
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charIndex = 0;
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else
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charIndex++;
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}
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line[LINESIZE - 2] = '\r';
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line[LINESIZE - 1] = '\n';
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if (!SendLine(sock, line))
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break;
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/* start printing from next char in the array */
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loopIndex++;
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}
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return TRUE;
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}
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DWORD WINAPI
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ChargenHandler(VOID* sock_)
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{
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INT retVal = 0;
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SOCKET sock = (SOCKET)sock_;
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if (!GenerateChars(sock))
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{
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LogEvent(L"Chargen: Char generation failed", 0, 0, LOG_FILE);
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retVal = 1;
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}
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LogEvent(L"Chargen: Shutting connection down...", 0, 0, LOG_FILE);
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if (ShutdownConnection(sock, FALSE))
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{
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LogEvent(L"Chargen: Connection is down", 0, 0, LOG_FILE);
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}
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else
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{
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LogEvent(L"Chargen: Connection shutdown failed", 0, 0, LOG_FILE);
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retVal = 1;
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}
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LogEvent(L"Chargen: Terminating thread", 0, 0, LOG_FILE);
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ExitThread(retVal);
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}
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