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/***************************************************************************
* Copyright (C) 2005-2012 by Oleksandr Shneyder *
* oleksandr.shneyder@obviously-nice.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. *
***************************************************************************/
#include "x2goclientconfig.h"
#include "x2gologdebug.h"
#include "sshmasterconnection.h"
#include "sshprocess.h"
#include <QTimer>
#ifndef Q_OS_WIN
#include <arpa/inet.h>
#include <netinet/tcp.h>
#endif
#undef DEBUG
// #define DEBUG
SshProcess::SshProcess(SshMasterConnection* master, QObject* parent): QObject(parent)
{
masterCon=master;
serverSocket=0;
connect(master,SIGNAL(stdErr(SshProcess*,QByteArray)),this,SLOT(slotStdErr(SshProcess*,QByteArray)));
connect(master,SIGNAL(ioErr(SshProcess*,QString,QString)),this,SLOT(slotIOerr(SshProcess*,QString,QString)));
tunnel=false;
normalExited=true;
}
SshProcess::~SshProcess()
{
#ifdef DEBUG
x2goDebug<<"ssh process destructor";
#endif
if (serverSocket>0)
{
#ifdef Q_OS_WIN
closesocket(serverSocket);
WSACleanup();
#else
close(serverSocket);
#endif
}
}
void SshProcess::slotCheckNewConnection()
{
fd_set rfds;
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 0;
FD_ZERO(&rfds);
FD_SET(serverSocket, &rfds);
if (select(serverSocket+1,&rfds,NULL,NULL,&tv)<=0)
return;
#ifdef DEBUG
x2goDebug<<"new tcp connection\n";
#endif
int tcpSocket=accept(serverSocket, (struct sockaddr*)&address,&addrlen);
#ifdef DEBUG
x2goDebug<<"new socket:"<<tcpSocket<<endl;
#endif
masterCon->addChannelConnection(this, tcpSocket, forwardHost, forwardPort, localHost,
ntohs(address.sin_port));
}
void SshProcess::tunnelLoop()
{
serverSocket=socket(AF_INET, SOCK_STREAM, 0);
if (serverSocket<=0)
{
QString err=tr("Error creating socket");
x2goDebug<<err<<endl;
emit sshFinished(false,err,this);
return;
}
#ifndef Q_OS_WIN
const int y=1;
#else
const char y=1;
#endif
setsockopt(serverSocket, SOL_SOCKET, SO_REUSEADDR,&y, sizeof(int));
setsockopt(serverSocket, IPPROTO_TCP, TCP_NODELAY,&y, sizeof(int));
address.sin_family=AF_INET;
address.sin_addr.s_addr=INADDR_ANY;
address.sin_port=htons(localPort);
if (bind(serverSocket,(struct sockaddr*) &address,sizeof(address))!=0)
{
QString err=tr("Error binding ")+localHost+":"+QString::number(localPort);
x2goDebug<<err<<endl;
emit sshFinished(false,err,this);
return;
}
listen(serverSocket,5);
addrlen=sizeof(struct sockaddr_in);
QTimer* timer=new QTimer();
connect(timer,SIGNAL(timeout()),this,SLOT(slotCheckNewConnection()));
timer->start(500);
emit sshTunnelOk();
#ifdef DEBUG
x2goDebug<<"Direct tunnel: waiting for connections on "<<localHost<<":"<<localPort<<endl;
#endif
}
void SshProcess::startNormal(const QString& cmd)
{
QString shcmd = "sh -c \""+cmd+"\"";
// #ifdef DEBUG
x2goDebug<<"executing remote command: "<<shcmd<<endl;
// #endif
masterCon->addChannelConnection(this, shcmd);
connect(masterCon,SIGNAL(stdOut(SshProcess*,QByteArray)),this,SLOT(slotStdOut(SshProcess*,QByteArray)));
connect(masterCon,SIGNAL(channelClosed(SshProcess*)), this,SLOT(slotChannelClosed(SshProcess*)));
}
void SshProcess::start_cp(QString src, QString dst)
{
connect(masterCon, SIGNAL(copyErr(SshProcess*,QString,QString)), this,
SLOT(slotCopyErr(SshProcess*,QString,QString)));
connect(masterCon, SIGNAL(copyOk(SshProcess*)), this,SLOT(slotCopyOk(SshProcess*)));
scpSource=src;
masterCon->addCopyRequest(this,src,dst);
}
void SshProcess::startTunnel(const QString& forwardHost, uint forwardPort, const QString& localHost,
uint localPort, bool reverse)
{
this->forwardHost=forwardHost;
this->forwardPort=forwardPort;
this->localHost=localHost;
this->localPort=localPort;
tunnel=true;
if (!reverse)
tunnelLoop();
else
{
connect(masterCon, SIGNAL(reverseListenOk(SshProcess*)), this, SLOT(slotReverseTunnelOk(SshProcess*)));
tunnelConnection=masterCon->reverseTunnelConnection(this, forwardPort, localHost, localPort);
}
}
void SshProcess::slotStdErr(SshProcess* creator, QByteArray data)
{
if (creator!=this)
return;
#ifdef DEBUG
x2goDebug<<"new err data:"<<data<<endl;
#endif
stdErrString+=data;
}
void SshProcess::slotStdOut(SshProcess* creator, QByteArray data)
{
if (creator!=this)
return;
// x2goDebug<<"new data"<<data<<endl;
stdOutString+=data;
}
void SshProcess::slotIOerr(SshProcess* creator, QString message, QString sshSessionErr)
{
if (creator!=this)
return;
#ifdef DEBUG
x2goDebug<<"io error:"<<message<<" - "<<sshSessionErr<<endl;
#endif
normalExited=false;
abortString=message+" - "+sshSessionErr;
}
void SshProcess::slotCopyErr(SshProcess* creator, QString message, QString sshSessionErr)
{
if (creator!=this)
return;
emit sshFinished(false, message+" - "+sshSessionErr, this);
}
void SshProcess::slotCopyOk(SshProcess* creator)
{
if (creator!=this)
return;
emit sshFinished(true,"", this);
}
void SshProcess::slotReverseTunnelOk(SshProcess* creator)
{
if (creator==this)
emit sshTunnelOk();
}
void SshProcess::slotChannelClosed(SshProcess* creator)
{
if (creator!=this)
return;
QString output;
if (!normalExited)
{
output=abortString;
}
else
{
if ( stdOutString.length()<=0 && stdErrString.length() >0 )
{
normalExited=false;
output=stdErrString;
#ifdef DEBUG
x2goDebug<<"have only stderr, something must be wrong"<<endl;
#endif
}
else
output=stdOutString;
}
#ifdef DEBUG
x2goDebug<<"ssh finished:"<<normalExited<<" - "<<output<<endl;
#endif
emit sshFinished(normalExited, output, this);
}
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