/**********************************************************************
** Copyright (C) 2000-2002 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#define _XOPEN_SOURCE
#include <pwd.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <shadow.h>

/* we need the _OS_LINUX stuff first ! */
#include <qglobal.h>

#ifndef  _OS_LINUX_

extern "C" {
#include <uuid/uuid.h>
#define UUID_H_INCLUDED
}

#endif // not defined linux

#if defined(_OS_LINUX_)
#include <shadow.h>
#endif

#include <qdir.h>
#include <qfile.h>
#include <qtextstream.h>
#include <qdatastream.h>
#include <qmessagebox.h>
#include <qstringlist.h>
#include <qfileinfo.h>
#include <qregexp.h>
//#include <qpe/qcopchannel_qws.h>
#include <qpe/process.h>
#include <qpe/global.h>
#include <qpe/config.h>
#include <qpe/contact.h>
#include <qpe/quuid.h>
#include <qpe/version.h>
#include <qpe/qcopenvelope_qws.h>

#include "transferserver.h"
#include "qprocess.h"

const int block_size = 51200;

TransferServer::TransferServer( Q_UINT16 port, QObject *parent ,
        const char* name )
    : QServerSocket( port, 1, parent, name )
{
    if ( !ok() )
  qWarning( "Failed to bind to port %d", port );
}

TransferServer::~TransferServer()
{

}

void TransferServer::newConnection( int socket )
{
    (void) new ServerPI( socket, this );
}

/*
 * small class in anonymous namespace
 * to generate a QUUid for us
 */
namespace {
    struct UidGen {
        QString uuid();
    };
#if !defined(_OS_LINUX_)
    QString UidGen::uuid() {
        uuid_t uuid;
        uuid_generate( uuid );
        return QUUid( uuid ).toString();
    }
#else
    /*
     * linux got a /proc/sys/kernel/random/uuid file
     * it'll generate the uuids for us
     */
    QString UidGen::uuid() {
        QFile file( "/proc/sys/kernel/random/uuid" );
        if (!file.open(IO_ReadOnly ) )
            return QString::null;

        QTextStream stream(&file);

        return "{" + stream.read().stripWhiteSpace() + "}";
    }
#endif
}

QString SyncAuthentication::serverId()
{
    Config cfg("Security");
    cfg.setGroup("Sync");
    QString r=cfg.readEntry("serverid");
    if ( r.isEmpty() ) {
        UidGen gen;
        r = gen.uuid();
        cfg.writeEntry("serverid", r );
    }
    return r;
}

QString SyncAuthentication::ownerName()
{
    QString vfilename = Global::applicationFileName("addressbook",
                "businesscard.vcf");
    if (QFile::exists(vfilename)) {
  Contact c;
  c = Contact::readVCard( vfilename )[0];
  return c.fullName();
    }

    return "";
}

QString SyncAuthentication::loginName()
{
    struct passwd *pw;
    pw = getpwuid( geteuid() );
    return QString::fromLocal8Bit( pw->pw_name );
}

int SyncAuthentication::isAuthorized(QHostAddress peeraddress)
{
    Config cfg("Security");
    cfg.setGroup("Sync");
//    QString allowedstr = cfg.readEntry("auth_peer","192.168.1.0");
     uint auth_peer = cfg.readNumEntry("auth_peer",0xc0a80100);

//    QHostAddress allowed;
//    allowed.setAddress(allowedstr);
//    uint auth_peer = allowed.ip4Addr();
    uint auth_peer_bits = cfg.readNumEntry("auth_peer_bits",24);
    uint mask = auth_peer_bits >= 32 // shifting by 32 is not defined
  ? 0xffffffff : (((1<<auth_peer_bits)-1)<<(32-auth_peer_bits));
    return (peeraddress.ip4Addr() & mask) == auth_peer;
}

bool SyncAuthentication::checkUser( const QString& user )
{
    if ( user.isEmpty() ) return FALSE;
    QString euser = loginName();
    return user == euser;
}

bool SyncAuthentication::checkPassword( const QString& password )
{
#ifdef ALLOW_UNIX_USER_FTP
    // First, check system password...

    struct passwd *pw = 0;
    struct spwd *spw = 0;

    pw = getpwuid( geteuid() );
    spw = getspnam( pw->pw_name );

    QString cpwd = QString::fromLocal8Bit( pw->pw_passwd );
    if ( cpwd == "x" && spw )
  cpwd = QString::fromLocal8Bit( spw->sp_pwdp );

    // Note: some systems use more than crypt for passwords.
    QString cpassword = QString::fromLocal8Bit( crypt( password.local8Bit(), cpwd.local8Bit() ) );
    if ( cpwd == cpassword )
  return TRUE;
#endif

    static int lastdenial=0;
    static int denials=0;
    int now = time(0);

    // Detect old Qtopia Desktop (no password)
    if ( password.isEmpty() ) {
  if ( denials < 1 || now > lastdenial+600 ) {
      QMessageBox::warning( 0,tr("Sync Connection"),
    tr("<p>An unauthorized system is requesting access to this device."
        "<p>If you are using a version of Qtopia Desktop older than 1.5.1, "
        "please upgrade."),
    tr("Deny") );
      denials++;
      lastdenial=now;
  }
  return FALSE;
    }

    // Second, check sync password...
    QString pass = password.left(6);
    /* old QtopiaDesktops are sending
     * rootme newer versions got a Qtopia
     * prefixed. Qtopia prefix will suceed
     * until the sync software syncs up
     * FIXME
     */
    if ( pass == "rootme" || pass == "Qtopia") {

  QString cpassword = QString::fromLocal8Bit( crypt( password.mid(8).local8Bit(), "qp" ) );
  Config cfg("Security");
  cfg.setGroup("Sync");
  QString pwds = cfg.readEntry("Passwords");
  if ( QStringList::split(QChar(' '),pwds).contains(cpassword) )
      return TRUE;

  // Unrecognized system. Be careful...

  if ( (denials > 2 && now < lastdenial+600)
      || QMessageBox::warning(0,tr("Sync Connection"),
    tr("<p>An unrecognized system is requesting access to this device."
        "<p>If you have just initiated a Sync for the first time, this is normal."),
    tr("Allow"),tr("Deny"), 0, 1, 1 ) ==1 )
  {
      denials++;
      lastdenial=now;
      return FALSE;
  } else {
      denials=0;
      cfg.writeEntry("Passwords",pwds+" "+cpassword);
      return TRUE;
  }
    }

    return FALSE;
}

ServerPI::ServerPI( int socket, QObject *parent , const char* name  )
    : QSocket( parent, name ) , dtp( 0 ), serversocket( 0 ), waitsocket( 0 )
{
    state = Connected;

    setSocket( socket );

    peerport = peerPort();
    peeraddress = peerAddress();

#ifndef INSECURE
    if ( !SyncAuthentication::isAuthorized(peeraddress) ) {
  state = Forbidden;
  startTimer( 0 );
    } else
#endif
    {
  connect( this, SIGNAL( readyRead() ), SLOT( read() ) );
  connect( this, SIGNAL( connectionClosed() ), SLOT( connectionClosed() ) );

  passiv = FALSE;
  for( int i = 0; i < 4; i++ )
      wait[i] = FALSE;

  send( "220 Qtopia " QPE_VERSION " FTP Server" );
  state = Wait_USER;

  dtp = new ServerDTP( this );
  connect( dtp, SIGNAL( completed() ), SLOT( dtpCompleted() ) );
  connect( dtp, SIGNAL( failed() ), SLOT( dtpFailed() ) );
  connect( dtp, SIGNAL( error( int ) ), SLOT( dtpError( int ) ) );


  directory = QDir::currentDirPath();

  static int p = 1024;

  while ( !serversocket || !serversocket->ok() ) {
      delete serversocket;
      serversocket = new ServerSocket( ++p, this );
  }
  connect( serversocket, SIGNAL( newIncomming( int ) ),
     SLOT( newConnection( int ) ) );
    }
}

ServerPI::~ServerPI()
{

}

void ServerPI::connectionClosed()
{
    // qDebug( "Debug: Connection closed" );
    delete this;
}

void ServerPI::send( const QString& msg )
{
    QTextStream os( this );
    os << msg << endl;
    //qDebug( "Reply: %s", msg.latin1() );
}

void ServerPI::read()
{
    while ( canReadLine() )
  process( readLine().stripWhiteSpace() );
}

bool ServerPI::checkReadFile( const QString& file )
{
    QString filename;

    if ( file[0] != "/" )
  filename = directory.path() + "/" + file;
    else
  filename = file;

    QFileInfo fi( filename );
    return ( fi.exists() && fi.isReadable() );
}

bool ServerPI::checkWriteFile( const QString& file )
{
    QString filename;

    if ( file[0] != "/" )
  filename = directory.path() + "/" + file;
    else
  filename = file;

    QFileInfo fi( filename );

    if ( fi.exists() )
  if ( !QFile( filename ).remove() )
      return FALSE;
    return TRUE;
}

void ServerPI::process( const QString& message )
{
    //qDebug( "Command: %s", message.latin1() );

    // split message using "," as separator
    QStringList msg = QStringList::split( " ", message );
    if ( msg.isEmpty() ) return;

    // command token
    QString cmd = msg[0].upper();

    // argument token
    QString arg;
    if ( msg.count() >= 2 )
  arg = msg[1];

    // full argument string
    QString args;
    if ( msg.count() >= 2 ) {
        QStringList copy( msg );
        // FIXME: for Qt3
        // copy.pop_front()
        copy.remove( copy.begin() );
        args = copy.join( " " );
    }

    //qDebug( "args: %s", args.latin1() );

    // we always respond to QUIT, regardless of state
    if ( cmd == "QUIT" ) {
  send( "211 Good bye!" );
  delete this;
  return;
    }

    // connected to client
    if ( Connected == state )
  return;

    // waiting for user name
    if ( Wait_USER == state ) {

  if ( cmd != "USER" || msg.count() < 2 || !SyncAuthentication::checkUser( arg ) ) {
      send( "530 Please login with USER and PASS" );
      return;
  }
  send( "331 User name ok, need password" );
  state = Wait_PASS;
  return;
    }

    // waiting for password
    if ( Wait_PASS == state ) {

  if ( cmd != "PASS" || !SyncAuthentication::checkPassword( arg ) ) {
      send( "530 Please login with USER and PASS" );
      return;
  }
  send( "230 User logged in, proceed" );
  state = Ready;
  return;
    }

    // ACCESS CONTROL COMMANDS


    // account (ACCT)
    if ( cmd == "ACCT" ) {
  // even wu-ftp does not support it
  send( "502 Command not implemented" );
    }

    // change working directory (CWD)
    else if ( cmd == "CWD" ) {

  if ( !args.isEmpty() ) {
      if ( directory.cd( args, TRUE ) )
    send( "250 Requested file action okay, completed" );
      else
    send( "550 Requested action not taken" );
  }
  else
      send( "500 Syntax error, command unrecognized" );
    }

    // change to parent directory (CDUP)
    else if ( cmd == "CDUP" ) {
  if ( directory.cdUp() )
      send( "250 Requested file action okay, completed" );
  else
      send( "550 Requested action not taken" );
    }

    // structure mount (SMNT)
    else if ( cmd == "SMNT" ) {
  // even wu-ftp does not support it
  send( "502 Command not implemented" );
    }

    // reinitialize (REIN)
    else if ( cmd == "REIN" ) {
  // even wu-ftp does not support it
  send( "502 Command not implemented" );
    }


    // TRANSFER PARAMETER COMMANDS


    // data port (PORT)
    else if ( cmd == "PORT" ) {
  if ( parsePort( arg ) )
      send( "200 Command okay" );
  else
      send( "500 Syntax error, command unrecognized" );
    }

    // passive (PASV)
    else if ( cmd == "PASV" ) {
  passiv = TRUE;
  send( "227 Entering Passive Mode ("
        + address().toString().replace( QRegExp( "\\." ), "," ) + ","
        + QString::number( ( serversocket->port() ) >> 8 ) + ","
        + QString::number( ( serversocket->port() ) & 0xFF ) +")" );
    }

    // representation type (TYPE)
    else if ( cmd == "TYPE" ) {
  if ( arg.upper() == "A" || arg.upper() == "I" )
      send( "200 Command okay" );
  else
      send( "504 Command not implemented for that parameter" );
    }

    // file structure (STRU)
    else if ( cmd == "STRU" ) {
  if ( arg.upper() == "F" )
      send( "200 Command okay" );
  else
      send( "504 Command not implemented for that parameter" );
    }

    // transfer mode (MODE)
    else if ( cmd == "MODE" ) {
  if ( arg.upper() == "S" )
      send( "200 Command okay" );
  else
      send( "504 Command not implemented for that parameter" );
    }


    // FTP SERVICE COMMANDS


    // retrieve (RETR)
    else if ( cmd == "RETR" )
  if ( !args.isEmpty() && checkReadFile( absFilePath( args ) )
       || backupRestoreGzip( absFilePath( args ) ) ) {
      send( "150 File status okay" );
      sendFile( absFilePath( args ) );
  }
  else {
      qDebug("550 Requested action not taken");
      send( "550 Requested action not taken" );
  }

    // store (STOR)
    else if ( cmd == "STOR" )
  if ( !args.isEmpty() && checkWriteFile( absFilePath( args ) ) ) {
      send( "150 File status okay" );
      retrieveFile( absFilePath( args ) );
  }
  else
      send( "550 Requested action not taken" );

    // store unique (STOU)
    else if ( cmd == "STOU" ) {
  send( "502 Command not implemented" );
    }

    // append (APPE)
    else if ( cmd == "APPE" ) {
  send( "502 Command not implemented" );
    }

    // allocate (ALLO)
    else if ( cmd == "ALLO" ) {
  send( "200 Command okay" );
    }

    // restart (REST)
    else if ( cmd == "REST" ) {
  send( "502 Command not implemented" );
    }

    // rename from (RNFR)
    else if ( cmd == "RNFR" ) {
  renameFrom = QString::null;
  if ( args.isEmpty() )
      send( "500 Syntax error, command unrecognized" );
  else {
      QFile file( absFilePath( args ) );
      if ( file.exists() ) {
    send( "350 File exists, ready for destination name" );
    renameFrom = absFilePath( args );
      }
      else
    send( "550 Requested action not taken" );
  }
    }

    // rename to (RNTO)
    else if ( cmd == "RNTO" ) {
  if ( lastCommand != "RNFR" )
      send( "503 Bad sequence of commands" );
  else if ( args.isEmpty() )
      send( "500 Syntax error, command unrecognized" );
  else {
      QDir dir( absFilePath( args ) );
      if ( dir.rename( renameFrom, absFilePath( args ), TRUE ) )
    send( "250 Requested file action okay, completed." );
      else
    send( "550 Requested action not taken" );
  }
    }

    // abort (ABOR)
    else if ( cmd.contains( "ABOR" ) ) {
  dtp->close();
  if ( dtp->dtpMode() != ServerDTP::Idle )
      send( "426 Connection closed; transfer aborted" );
  else
      send( "226 Closing data connection" );
    }

    // delete (DELE)
    else if ( cmd == "DELE" ) {
  if ( args.isEmpty() )
      send( "500 Syntax error, command unrecognized" );
  else {
      QFile file( absFilePath( args ) ) ;
      if ( file.remove() ) {
    send( "250 Requested file action okay, completed" );
    QCopEnvelope e("QPE/System", "linkChanged(QString)" );
    e << file.name();
      } else {
    send( "550 Requested action not taken" );
      }
  }
    }

    // remove directory (RMD)
    else if ( cmd == "RMD" ) {
  if ( args.isEmpty() )
      send( "500 Syntax error, command unrecognized" );
  else {
      QDir dir;
      if ( dir.rmdir( absFilePath( args ), TRUE ) )
    send( "250 Requested file action okay, completed" );
      else
    send( "550 Requested action not taken" );
  }
    }

    // make directory (MKD)
    else if ( cmd == "MKD" ) {
  if ( args.isEmpty() ) {
      qDebug(" Error: no arg");
      send( "500 Syntax error, command unrecognized" );
  }
  else {
      QDir dir;
      if ( dir.mkdir( absFilePath( args ), TRUE ) )
    send( "250 Requested file action okay, completed." );
      else
    send( "550 Requested action not taken" );
  }
    }

    // print working directory (PWD)
    else if ( cmd == "PWD" ) {
  send( "257 \"" + directory.path() +"\"" );
    }

    // list (LIST)
    else if ( cmd == "LIST" ) {
  if ( sendList( absFilePath( args ) ) )
      send( "150 File status okay" );
  else
      send( "500 Syntax error, command unrecognized" );
    }

    // size (SIZE)
    else if ( cmd == "SIZE" ) {
  QString filePath = absFilePath( args );
  QFileInfo fi( filePath );
  bool gzipfile = backupRestoreGzip( filePath );
  if ( !fi.exists() && !gzipfile )
      send( "500 Syntax error, command unrecognized" );
  else {
      if ( !gzipfile )
    send( "213 " + QString::number( fi.size() ) );
      else {
    Process duproc( QString("du") );
    duproc.addArgument("-s");
    QString in, out;
    if ( !duproc.exec(in, out) ) {
        qDebug("du process failed; just sending back 1K");
        send( "213 1024");
    }
    else {
        QString size = out.left( out.find("\t") );
        int guess = size.toInt()/5;
        if ( filePath.contains("doc") )
      guess *= 1000;
        qDebug("sending back gzip guess of %d", guess);
        send( "213 " + QString::number(guess) );
    }
      }
  }
    }
    // name list (NLST)
    else if ( cmd == "NLST" ) {
  send( "502 Command not implemented" );
    }

    // site parameters (SITE)
    else if ( cmd == "SITE" ) {
  send( "502 Command not implemented" );
    }

    // system (SYST)
    else if ( cmd == "SYST" ) {
  send( "215 UNIX Type: L8" );
    }

    // status (STAT)
    else if ( cmd == "STAT" ) {
  send( "502 Command not implemented" );
    }

    // help (HELP )
    else if ( cmd == "HELP" ) {
  send( "502 Command not implemented" );
    }

    // noop (NOOP)
    else if ( cmd == "NOOP" ) {
  send( "200 Command okay" );
    }

    // not implemented
    else
  send( "502 Command not implemented" );

    lastCommand = cmd;
}

bool ServerPI::backupRestoreGzip( const QString &file )
{
    return (file.find( "backup" ) != -1 &&
      file.findRev( ".tgz" ) == (int)file.length()-4 );
}

bool ServerPI::backupRestoreGzip( const QString &file, QStringList &targets )
{
  if ( file.find( "backup" ) != -1 &&
       file.findRev( ".tgz" ) == (int)file.length()-4 ) {
      QFileInfo info( file );
      targets = info.dirPath( TRUE );
      qDebug("ServerPI::backupRestoreGzip for %s = %s", file.latin1(),
       targets.join(" ").latin1() );
      return true;
  }
  return false;
}

void ServerPI::sendFile( const QString& file )
{
    if ( passiv ) {
  wait[SendFile] = TRUE;
  waitfile = file;
  if ( waitsocket )
      newConnection( waitsocket );
    }
    else {
      QStringList targets;
      if ( backupRestoreGzip( file, targets ) )
    dtp->sendGzipFile( file, targets, peeraddress, peerport );
      else dtp->sendFile( file, peeraddress, peerport );
    }
}

void ServerPI::retrieveFile( const QString& file )
{
    if ( passiv ) {
  wait[RetrieveFile] = TRUE;
  waitfile = file;
  if ( waitsocket )
      newConnection( waitsocket );
    }
    else {
      QStringList targets;
      if ( backupRestoreGzip( file, targets ) )
  dtp->retrieveGzipFile( file, peeraddress, peerport );
      else
  dtp->retrieveFile( file, peeraddress, peerport );
    }
}

bool ServerPI::parsePort( const QString& pp )
{
    QStringList p = QStringList::split( ",", pp );
    if ( p.count() != 6 ) return FALSE;

    // h1,h2,h3,h4,p1,p2
    peeraddress = QHostAddress( ( p[0].toInt() << 24 ) + ( p[1].toInt() << 16 ) +
        ( p[2].toInt() << 8 ) + p[3].toInt() );
    peerport = ( p[4].toInt() << 8 ) + p[5].toInt();
    return TRUE;
}

void ServerPI::dtpCompleted()
{
    send( "226 Closing data connection, file transfer successful" );
    if ( dtp->dtpMode() == ServerDTP::RetrieveFile ) {
  QString fn = dtp->fileName();
  if ( fn.right(8)==".desktop" && fn.find("/Documents/")>=0 ) {
      QCopEnvelope e("QPE/System", "linkChanged(QString)" );
      e << fn;
  }
    }
    waitsocket = 0;
    dtp->close();
}

void ServerPI::dtpFailed()
{
    dtp->close();
    waitsocket = 0;
    send( "451 Requested action aborted: local error in processing" );
}

void ServerPI::dtpError( int )
{
    dtp->close();
    waitsocket = 0;
    send( "451 Requested action aborted: local error in processing" );
}

bool ServerPI::sendList( const QString& arg )
{
    QByteArray listing;
    QBuffer buffer( listing );

    if ( !buffer.open( IO_WriteOnly ) )
  return FALSE;

    QTextStream ts( &buffer );
    QString fn = arg;

    if ( fn.isEmpty() )
  fn = directory.path();

    QFileInfo fi( fn );
    if ( !fi.exists() ) return FALSE;

    // return file listing
    if ( fi.isFile() ) {
  ts << fileListing( &fi ) << endl;
    }

    // return directory listing
    else if ( fi.isDir() ) {
  QDir dir( fn );
  const QFileInfoList *list = dir.entryInfoList( QDir::All | QDir::Hidden );

  QFileInfoListIterator it( *list );
  QFileInfo *info;

  unsigned long total = 0;
  while ( ( info = it.current() ) ) {
      if ( info->fileName() != "." && info->fileName() != ".." )
    total += info->size();
      ++it;
  }

  ts << "total " << QString::number( total / 1024 ) << endl;

  it.toFirst();
  while ( ( info = it.current() ) ) {
      if ( info->fileName() == "." || info->fileName() == ".." ) {
    ++it;
    continue;
      }
      ts << fileListing( info ) << endl;
      ++it;
  }
    }

    if ( passiv ) {
  waitarray = buffer.buffer();
  wait[SendByteArray] = TRUE;
  if ( waitsocket )
      newConnection( waitsocket );
    }
    else
  dtp->sendByteArray( buffer.buffer(), peeraddress, peerport );
    return TRUE;
}

QString ServerPI::fileListing( QFileInfo *info )
{
    if ( !info ) return QString::null;
    QString s;

    // type char
    if ( info->isDir() )
  s += "d";
    else if ( info->isSymLink() )
  s += "l";
    else
  s += "-";

    // permisson string
    s += permissionString( info ) + " ";

    // number of hardlinks
    int subdirs = 1;

    if ( info->isDir() )
  subdirs = 2;
    // FIXME : this is to slow
    //if ( info->isDir() )
    //subdirs = QDir( info->absFilePath() ).entryList( QDir::Dirs ).count();

    s += QString::number( subdirs ).rightJustify( 3, ' ', TRUE ) + " ";

    // owner
    s += info->owner().leftJustify( 8, ' ', TRUE ) + " ";

    // group
    s += info->group().leftJustify( 8, ' ', TRUE ) + " ";

    // file size in bytes
    s += QString::number( info->size() ).rightJustify( 9, ' ', TRUE ) + " ";

    // last modified date
    QDate date = info->lastModified().date();
    QTime time = info->lastModified().time();
    s += date.monthName( date.month() ) + " "
   + QString::number( date.day() ).rightJustify( 2, ' ', TRUE ) + " "
   + QString::number( time.hour() ).rightJustify( 2, '0', TRUE ) + ":"
   + QString::number( time.minute() ).rightJustify( 2,'0', TRUE ) + " ";

    // file name
    s += info->fileName();

    return s;
}

QString ServerPI::permissionString( QFileInfo *info )
{
    if ( !info ) return QString( "---------" );
    QString s;

    // user
    if ( info->permission( QFileInfo::ReadUser ) ) s += "r";
    else s += "-";
    if ( info->permission( QFileInfo::WriteUser ) ) s += "w";
    else s += "-";
    if ( info->permission( QFileInfo::ExeUser ) ) s += "x";
    else s += "-";

    // group
    if ( info->permission( QFileInfo::ReadGroup ) ) s += "r";
    else s += "-";
    if ( info->permission( QFileInfo::WriteGroup ) )s += "w";
    else s += "-";
    if ( info->permission( QFileInfo::ExeGroup ) ) s += "x";
    else s += "-";

    // exec
    if ( info->permission( QFileInfo::ReadOther ) ) s += "r";
    else s += "-";
    if ( info->permission( QFileInfo::WriteOther ) ) s += "w";
    else s += "-";
    if ( info->permission( QFileInfo::ExeOther ) ) s += "x";
    else s += "-";

    return s;
}

void ServerPI::newConnection( int socket )
{
    //qDebug( "New incomming connection" );

    if ( !passiv ) return;

    if ( wait[SendFile] ) {
  QStringList targets;
  if ( backupRestoreGzip( waitfile, targets ) )
      dtp->sendGzipFile( waitfile, targets );
  else
      dtp->sendFile( waitfile );
  dtp->setSocket( socket );
    }
    else if ( wait[RetrieveFile] ) {
      qDebug("check retrieve file");
      if ( backupRestoreGzip( waitfile ) )
  dtp->retrieveGzipFile( waitfile );
      else
  dtp->retrieveFile( waitfile );
      dtp->setSocket( socket );
    }
    else if ( wait[SendByteArray] ) {
  dtp->sendByteArray( waitarray );
  dtp->setSocket( socket );
    }
    else if ( wait[RetrieveByteArray] ) {
  qDebug("retrieve byte array");
  dtp->retrieveByteArray();
  dtp->setSocket( socket );
    }
    else
  waitsocket = socket;

    for( int i = 0; i < 4; i++ )
  wait[i] = FALSE;
}

QString ServerPI::absFilePath( const QString& file )
{
    if ( file.isEmpty() ) return file;

    QString filepath( file );
    if ( file[0] != "/" )
  filepath = directory.path() + "/" + file;

    return filepath;
}


void ServerPI::timerEvent( QTimerEvent * )
{
    connectionClosed();
}


ServerDTP::ServerDTP( QObject *parent, const char* name)
  : QSocket( parent, name ), mode( Idle ), createTargzProc( 0 ),
retrieveTargzProc( 0 ), gzipProc( 0 )
{

  connect( this, SIGNAL( connected() ), SLOT( connected() ) );
  connect( this, SIGNAL( connectionClosed() ), SLOT( connectionClosed() ) );
  connect( this, SIGNAL( bytesWritten( int ) ), SLOT( bytesWritten( int ) ) );
  connect( this, SIGNAL( readyRead() ), SLOT( readyRead() ) );

  gzipProc = new QProcess( this, "gzipProc" );
  gzipProc->setCommunication( QProcess::Stdin | QProcess::Stdout );

  createTargzProc = new QProcess( QString("tar"), this, "createTargzProc");
  createTargzProc->setCommunication( QProcess::Stdout );
  createTargzProc->setWorkingDirectory( QDir::rootDirPath() );
  connect( createTargzProc, SIGNAL( processExited() ), SLOT( targzDone() ) );

  QStringList args = "tar";
  args += "-xv";
  retrieveTargzProc = new QProcess( args, this, "retrieveTargzProc" );
  retrieveTargzProc->setCommunication( QProcess::Stdin );
  retrieveTargzProc->setWorkingDirectory( QDir::rootDirPath() );
  connect( retrieveTargzProc, SIGNAL( processExited() ),
     SIGNAL( completed() ) );
  connect( retrieveTargzProc, SIGNAL( processExited() ),
     SLOT( extractTarDone() ) );
}

ServerDTP::~ServerDTP()
{
    buf.close();
    file.close();
    createTargzProc->kill();
}

void ServerDTP::extractTarDone()
{
    qDebug("extract done");
#ifndef QT_NO_COP
    QCopEnvelope e( "QPE/Desktop", "restoreDone(QString)" );
    e << file.name();
#endif
}

void ServerDTP::connected()
{
  // send file mode
  switch ( mode ) {
  case SendFile :
    if ( !file.exists() || !file.open( IO_ReadOnly) ) {
      emit failed();
      mode = Idle;
      return;
    }

    //qDebug( "Debug: Sending file '%s'", file.name().latin1() );

    bytes_written = 0;
    if ( file.size() == 0 ) {
      //make sure it doesn't hang on empty files
      file.close();
      emit completed();
      mode = Idle;
    } else {

      if( !file.atEnd() ) {
  QCString s;
  s.resize( block_size );
  int bytes = file.readBlock( s.data(), block_size );
  writeBlock( s.data(), bytes );
      }
    }
    break;
  case SendGzipFile:
    if ( createTargzProc->isRunning() ) {
      // SHOULDN'T GET HERE, BUT DOING A SAFETY CHECK ANYWAY
      qWarning("Previous tar --gzip process is still running; killing it...");
      createTargzProc->kill();
    }

    bytes_written = 0;
    qDebug("==>start send tar process");
    if ( !createTargzProc->start() )
      qWarning("Error starting %s or %s",
         createTargzProc->arguments().join(" ").latin1(),
         gzipProc->arguments().join(" ").latin1() );
    break;
  case SendBuffer:
    if ( !buf.open( IO_ReadOnly) ) {
      emit failed();
      mode = Idle;
      return;
    }

    // qDebug( "Debug: Sending byte array" );
    bytes_written = 0;
    while( !buf.atEnd() )
      putch( buf.getch() );
    buf.close();
    break;
  case RetrieveFile:
    // retrieve file mode
    if ( file.exists() && !file.remove() ) {
      emit failed();
      mode = Idle;
      return;
    }

    if ( !file.open( IO_WriteOnly) ) {
      emit failed();
      mode = Idle;
      return;
    }
    // qDebug( "Debug: Retrieving file %s", file.name().latin1() );
    break;
  case RetrieveGzipFile:
    qDebug("=-> starting tar process to receive .tgz file");
    break;
  case RetrieveBuffer:
    // retrieve buffer mode
    if ( !buf.open( IO_WriteOnly) ) {
      emit failed();
      mode = Idle;
      return;
    }
    // qDebug( "Debug: Retrieving byte array" );
    break;
  case Idle:
    qDebug("connection established but mode set to Idle; BUG!");
    break;
  }
}

void ServerDTP::connectionClosed()
{
    //qDebug( "Debug: Data connection closed %ld bytes written", bytes_written );

    // send file mode
    if ( SendFile == mode ) {
  if ( bytes_written == file.size() )
      emit completed();
  else
      emit failed();
    }

    // send buffer mode
    else if ( SendBuffer == mode ) {
  if ( bytes_written == buf.size() )
      emit completed();
  else
      emit failed();
    }

    // retrieve file mode
    else if ( RetrieveFile == mode ) {
  file.close();
  emit completed();
    }

    else if ( RetrieveGzipFile == mode ) {
  qDebug("Done writing ungzip file; closing input");
  gzipProc->flushStdin();
  gzipProc->closeStdin();
    }

    // retrieve buffer mode
    else if ( RetrieveBuffer == mode ) {
  buf.close();
  emit completed();
    }

    mode = Idle;
}

void ServerDTP::bytesWritten( int bytes )
{
    bytes_written += bytes;

    // send file mode
    if ( SendFile == mode ) {

  if ( bytes_written == file.size() ) {
      // qDebug( "Debug: Sending complete: %d bytes", file.size() );
      file.close();
      emit completed();
      mode = Idle;
  }
  else if( !file.atEnd() ) {
      QCString s;
      s.resize( block_size );
      int bytes = file.readBlock( s.data(), block_size );
      writeBlock( s.data(), bytes );
  }
    }

    // send buffer mode
    if ( SendBuffer == mode ) {

  if ( bytes_written == buf.size() ) {
      // qDebug( "Debug: Sending complete: %d bytes", buf.size() );
      emit completed();
      mode = Idle;
  }
    }
}

void ServerDTP::readyRead()
{
    // retrieve file mode
    if ( RetrieveFile == mode ) {
  QCString s;
  s.resize( bytesAvailable() );
  readBlock( s.data(), bytesAvailable() );
  file.writeBlock( s.data(), s.size() );
    }
    else if ( RetrieveGzipFile == mode ) {
  if ( !gzipProc->isRunning() )
      gzipProc->start();

        QByteArray s;
  s.resize( bytesAvailable() );
  readBlock( s.data(), bytesAvailable() );
  gzipProc->writeToStdin( s );
  qDebug("wrote %d bytes to ungzip ", s.size() );
    }
    // retrieve buffer mode
    else if ( RetrieveBuffer == mode ) {
  QCString s;
  s.resize( bytesAvailable() );
  readBlock( s.data(), bytesAvailable() );
  buf.writeBlock( s.data(), s.size() );
    }
}

void ServerDTP::writeTargzBlock()
{
    QByteArray block = gzipProc->readStdout();
    writeBlock( block.data(), block.size() );
    qDebug("writeTargzBlock %d", block.size());
    if ( !createTargzProc->isRunning() ) {
  qDebug("tar and gzip done");
  emit completed();
  mode = Idle;
  disconnect( gzipProc, SIGNAL( readyReadStdout() ),
        this, SLOT( writeTargzBlock() ) );
    }
}

void ServerDTP::targzDone()
{
    //qDebug("targz done");
    disconnect( createTargzProc, SIGNAL( readyReadStdout() ),
    this, SLOT( gzipTarBlock() ) );
    gzipProc->closeStdin();
}

void ServerDTP::gzipTarBlock()
{
    //qDebug("gzipTarBlock");
    if ( !gzipProc->isRunning() ) {
  //qDebug("auto start gzip proc");
  gzipProc->start();
    }
    gzipProc->writeToStdin( createTargzProc->readStdout() );
}

void ServerDTP::sendFile( const QString fn, const QHostAddress& host, Q_UINT16 port )
{
    file.setName( fn );
    mode = SendFile;
    connectToHost( host.toString(), port );
}

void ServerDTP::sendFile( const QString fn )
{
    file.setName( fn );
    mode = SendFile;
}

void ServerDTP::sendGzipFile( const QString &fn,
            const QStringList &archiveTargets,
            const QHostAddress& host, Q_UINT16 port )
{
    sendGzipFile( fn, archiveTargets );
    connectToHost( host.toString(), port );
}

void ServerDTP::sendGzipFile( const QString &fn,
            const QStringList &archiveTargets  )
{
    mode = SendGzipFile;
    file.setName( fn );

    QStringList args = "tar";
    args += "-cv";
    args += archiveTargets;
    qDebug("sendGzipFile %s", args.join(" ").latin1() );
    createTargzProc->setArguments( args );
    connect( createTargzProc,
       SIGNAL( readyReadStdout() ), SLOT( gzipTarBlock() ) );

    gzipProc->setArguments( "gzip" );
    connect( gzipProc, SIGNAL( readyReadStdout() ),
       SLOT( writeTargzBlock() ) );
}

void ServerDTP::gunzipDone()
{
    qDebug("gunzipDone");
    disconnect( gzipProc, SIGNAL( processExited() ),
    this, SLOT( gunzipDone() ) );
    retrieveTargzProc->closeStdin();
    disconnect( gzipProc, SIGNAL( readyReadStdout() ),
        this, SLOT( tarExtractBlock() ) );
}

void ServerDTP::tarExtractBlock()
{
    qDebug("ungzipTarBlock");
    if ( !retrieveTargzProc->isRunning() ) {
  qDebug("auto start ungzip proc");
  if ( !retrieveTargzProc->start() )
      qWarning(" failed to start tar -x process");
    }
    retrieveTargzProc->writeToStdin( gzipProc->readStdout() );
}


void ServerDTP::retrieveFile( const QString fn, const QHostAddress& host, Q_UINT16 port )
{
    file.setName( fn );
    mode = RetrieveFile;
    connectToHost( host.toString(), port );
}

void ServerDTP::retrieveFile( const QString fn )
{
    file.setName( fn );
    mode = RetrieveFile;
}

void ServerDTP::retrieveGzipFile( const QString &fn )
{
    qDebug("retrieveGzipFile %s", fn.latin1());
    file.setName( fn );
    mode = RetrieveGzipFile;

    gzipProc->setArguments( "gunzip" );
    connect( gzipProc, SIGNAL( readyReadStdout() ),
       SLOT( tarExtractBlock() ) );
    connect( gzipProc, SIGNAL( processExited() ),
       SLOT( gunzipDone() ) );
}

void ServerDTP::retrieveGzipFile( const QString &fn, const QHostAddress& host, Q_UINT16 port )
{
    retrieveGzipFile( fn );
    connectToHost( host.toString(), port );
}

void ServerDTP::sendByteArray( const QByteArray& array, const QHostAddress& host, Q_UINT16 port )
{
    buf.setBuffer( array );
    mode = SendBuffer;
    connectToHost( host.toString(), port );
}

void ServerDTP::sendByteArray( const QByteArray& array )
{
    buf.setBuffer( array );
    mode = SendBuffer;
}

void ServerDTP::retrieveByteArray( const QHostAddress& host, Q_UINT16 port )
{
    buf.setBuffer( QByteArray() );
    mode = RetrieveBuffer;
    connectToHost( host.toString(), port );
}

void ServerDTP::retrieveByteArray()
{
    buf.setBuffer( QByteArray() );
    mode = RetrieveBuffer;
}

void ServerDTP::setSocket( int socket )
{
    QSocket::setSocket( socket );
    connected();
}