crouteurlinux.cpp

PPP协议的实现演示

#include "globals.h"
#include "linuxconf.h"

/***************************************************************************
                          crouteurlinux.cpp  -  description
                             -------------------
    begin                : Tue Jun 19 2001
    copyright            : (C) 2001 by stephane (birdy57)
    email                : [e-mail]
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "crouteurlinux.h"

CRouteurLinux::CRouteurLinux()
{
    ifname = new char[30];
    has_proxy_arp = 0;
    tune_kernel = 0;

}

CRouteurLinux::~CRouteurLinux()
{
}

/** copie un fichier en ecrasant la destination */
bool CRouteurLinux::FileCopy(char *sSource, char *sDestination)
{
    char sBlock[1024];
    int nEntree, nSortie;
    int nLu;
    bool bRet = false;

    if (FileExist(sSource)) {
	if (FileExist(sDestination))
	    unlink(sDestination);

	if ((nEntree = open(sSource, O_RDONLY)) > 0)
	    if ((nSortie =
		 open(sDestination, O_WRONLY | O_CREAT,
		      S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) > 0) {
		while ((nLu = read(nEntree, sBlock, sizeof(sBlock))) > 0)
		    write(nSortie, sBlock, nLu);
		close(nEntree);
		close(nSortie);
		bRet = true;
	    } else
		close(nEntree);
    }

    return bRet;
}

/** Demmarre le routage */
bool CRouteurLinux::Start()
{
    int GuidIn, GuidOut;
    bool bRet = false;
    char *Source = "/etc/resolv.conf";
    char *Destination = "/etc/resolv.peng";
    char cBuffer[200];
    bool bDin = false;
    bool bDout = false;

    m_nErrorNbr = 0;

// initialise le routage

    sys_init();

    GuidIn = GetGuidIn();
    GuidOut = GetGuidOut();

// Teste si les drivers sont supporter
// ici on place les drivers d'entree

    switch (GuidIn) {
    case Modem:
    case Cable:
	bDin = true;
	break;
    }

// et ici de sortie

    switch (GuidOut) {
    case Ppp:
    case TunTap:
	bDout = true;
	break;
    }

// Le switch permet d'en rajouter facilement

    if ((!bDin) || (!bDout))
	m_nErrorNbr = 59;
    else {
	// on s'occupe d'abord de la table DNS commun