/***************************************************************************
 *   Copyright (C) 2004 by Christoph Thielecke                             *
 *   crissi99@gmx.de                                                       *
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef __UTILS_H____
#define __UTILS_H____

#include <qobject.h>
#include <qprocess.h>
#include <qvaluelist.h>
#include "kvpncconfig.h"
#include "kvpnc.h"
#include "toolinfo.h"
#include <qstringlist.h>
#include <ktempfile.h>

/**
Provides various help functions.
 
@author Christoph Thielecke
*/
class Utils : public QObject
{
	Q_OBJECT
public:
	Utils(KVpncConfig* config,QObject *parent = 0, const char *name = 0);

	~Utils();

	bool isValidIPv4Address(QString Address);
	bool isValidIPv4NetworkAddress(QString Address);
	bool isValidIPv4BroadcastAddress(QString Address);
	bool isValidIPv4Netmask(QString Netmask);
	bool tunDevExists();
	bool createTunDev();
	bool loadKernelModule(QString Name,QApplication *app);
	bool unloadKernelModule(QString Name,QApplication *app, bool force=true);
	bool doChmod(QString file, QString mode);
	bool resolvConfAvailable();
	QStringList getOpenvpnCiphers();
	QStringList getOpenvpnDigests();
	QPtrList<ToolInfo>* getToolList();
	ToolInfo* getToolInfo( QString name);
	QString resolveName(QString Name);
	QString removeSpecialCharsForFilename(QString filename);
	QString getNameAndPidOfProgramListen(int port);
	QString getEmailAddressOfCert(QString cert);
	QString getHostname();
	QStringList getSmartcardSlots(QString ProviderLib);
	QStringList getSmartcardCertsFromSlot(QString slot,QString IdType,QString ProviderLib);
	QStringList getOpenvpnPkcs11Ids(QString ProviderLib);
	bool getNeedsPassphrase(QString key);
	QStringList getCertsFromCiscoCertStore(QString type="user");
	QString dec2bin(int n);
	int dottedIpv4Netmask2NetmaskBytes(QString dottedIpv4Netmask);
	QString IpsecAlgoCurrent;
	struct IpsecAlgos {
		QStringList IpsecIkeEncryptionAlgorithms;
		QStringList IpsecIkeHashAlgorithms;
		QStringList IpsecIkeDhGroups;
		QStringList IpsecEspEncryptionAlgorithms;
		QStringList IpsecEspAuthenticationAlgorithms;
		QStringList IpsecCompressionAlgorithms;
	};

	struct PppdCapabilities {
		bool pppdHasMppeRequiredSupport;
		bool pppdHasRequireMppeSupport;
		bool pppdHasReplacedefaultrouteSupport;

		/* options for pppd depending on pppd version */

		// MPPE
		QString RequireMppeOption;
		QString Require128BitMppeOption;
		QString RefuseMppeOption;
		QString Refuse40BitMppeOption;
		QString Refuse128BitMppeOption;
		QString RequireStatelessOption;
		QString RequireStatefulOption;
		bool MppeOptionsInALine; // older pppd need all in one line

		// AUTH
		QString RequireAuthChapOption;
		QString RequireAuthMschapOption;
		QString RequireAuthMschapv2Option;
		QString RequireAuthPapOption;

		bool pppdHasMppeSupport; //< true if pppd has mppe support
		bool oldPppdStyle; //< true if old style was found ('mppe require')
		bool pppdOk; // if pppd could started
	};

	struct IpsecAlgos getKernelCrypto();
	struct IpsecAlgos getIpsecAlgos();
	struct PppdCapabilities checkPppdCapabilities();

public slots:
	void readStdOutCreateTunDev();
	void readStdErrCreateTunDev();
	void readStdOutLoadKernelModule();
	void readStdErrLoadKernelModule();
	void readStdOutToolsTest();
	void readStdErrToolsTest();
	void readStdOutRetriveOpenvpnCiphers();
	void readStdErrRetriveOpenvpnCiphers();
	void readStdOutRetriveIpsecAlgos();
	void readStdErrRetriveIpsecAlgos();
	void readStdOutRetriveOpenvpnDigests();
	void readStdErrRetriveOpenvpnDigests();
	void readStdOutGetNameAndPidOfProgramListen();
	void readStdErrGetNameAndPidOfProgramListen();
	void readOutGetEmailAddressOfCert();
	void readOutGetSmartcardSlots(KProcess *   proc, char *   buffer, int   buflen);
	void readOutGetSmartcardCertsFromSlot();
	void readOutGetOpenvpnPkcs11Ids();
	void readOutNeedsPassphrase();
	void readOutGetCertsFromCiscoCertStoreSlot();
	void readPppdtestProcessOutput();
	void readStdOutGetHostname();
	void readStdErrGetHostname();
	

private:
	bool modprobeSuccess;
	bool toolsTestSuccess;
	bool retrieveOpenvpnCiphers;
	bool retrieveOpenvpnDigests;
	bool retrieveIpsecAlgos;
	bool retrieveNameAndPidOfProgramListen;
	bool retrieveHotsname;
	bool needsPassphrase;
	bool testPppdReplacedefaultroute;
	bool testPppdRequireMppe128;
	bool testPppdMppeRequiredSupport;
	bool testPppdNomppeStatefulSupport;
	bool testPppdStatelessSupport;
	bool testOldPppdStyle;
	bool testPppdRequireMppe;
	bool testPppdMppeRequired;
	
	QString tooltest_logfile;
	QProcess *ModprobeProcess;
	QProcess *createProcess;
	QProcess *NetworkDeviceTestProcess;
	QProcess *toolsTestProcess;
	QProcess *OpenvpnCiphersProcess;
	QProcess *OpenvpnDigestProcess;
	QProcess *NameAndPidOfProgramListenProcess;
	QProcess *GetEmailAddressOfCertProcess;
	KProcess *GetSmartcardSlotsProcess;
	QProcess *GetSmartcardCertsFromSlotProcess;
	QProcess *OpenvpnPkcs11IdsProcess;
	QProcess *GetCertsFromCiscoCertStoreProcess;
	QProcess *NeedsPassphraseProcess;
	QProcess *IpsecAlgosProcess;
	QProcess *TestPppdProcess;
	QProcess *GetHostnameProcess;
	
	QString resolvedIP;
	bool resolveFinished;
	QValueList<QHostAddress> list;
	QStringList *env;
	KVpncConfig *config;
	KTempFile *tmpfile;
	bool retrieveValidNetworkdevice;
	bool Pkcs11CertFound;
	QStringList OpenvpnCiphers;
	QStringList OpenvpnDigests;
	QStringList KernelCrypto;
	QString NameAndPidOfProgramListen;
	QString EmailAddressOfCert;
	QString OpenvpnDigestString;
	QString IdType;
	QString Hostname;
	QStringList SmartcardSlots;
	QStringList SmartcardCertsFromSlot;
	QStringList CertsFromCiscoCertStore;
	QStringList OpenvpnPkcs11Ids;

	int CertsFromCiscoCertPos;
	int ListenPort;
	int OpenvpnDigestCount;
	PppdCapabilities pppdcap;
};

#endif