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desarrollosconsejeria/controlwifi/2.0-4/controlwifiserver/qsshsocket.cpp @ 23a384b9

23a384b9 Elisa
#include "qsshsocket.h"
#include <QFileInfo>

QSshSocket::QSshSocket(QObject * parent )
:QThread(parent)
{
m_host = "";
m_user = "";
m_password = "";
m_port = -1;
m_loggedIn = false;
m_session = NULL;
m_clone = NULL;
m_workingDirectory = ".";

qRegisterMetaType<QSshSocket::SshError>("QSshSocket::SshError");
m_currentOperation.executed = true;

m_run = true;
start();
}

QSshSocket::~QSshSocket()
{
if (m_session != NULL)
ssh_free(m_session);
m_run = false;
this->wait();
}

void QSshSocket::run()
{

while(m_run)
{
if (m_session == NULL)
{
if (m_host != "")
m_attemptConnect();
}


// if we have a vaild ssh connection, authenticate connection with credentials
else if (!m_loggedIn)
{
// check to see if a username and a password have been given
if (m_user != "" && m_password !="")
m_attemptLogin();
}
// if all ssh setup has been completed, check to see if we have any commands to execute
else if (!m_currentOperation.executed)
{

if (m_currentOperation.type == Command || m_currentOperation.type == WorkingDirectoryTest)
m_attemptCommand();
// if all ssh setup has been completed, check to see if we have any file transfers to execute
else if (m_currentOperation.type == Pull)
m_attemptPull();
else if (m_currentOperation.type == Push)
m_attemptPush();


m_currentOperation.executed = true;
}
else
{
msleep(100);
}

}

}

void QSshSocket::clone()
{
m_clone = new QSshSocket(this->parent());
connect(m_clone,SIGNAL(connected()),this,SLOT(m_onCloneConnect()));
connect(m_clone,SIGNAL(loginSuccessful()),this,SLOT(m_onCloneLoggedIn()));
connect(m_clone,SIGNAL(workingDirectorySet(QString)),this,SLOT(m_onCloneCWDSet(QString)));
connect(m_clone,SIGNAL(error(QSshSocket::SshError)),this,SLOT(m_onCloneError(QSshSocket::SshError)));

if (m_connected)
m_clone->connectToHost(m_host,m_port,m_loggingProtocol);
else
{
m_releaseClone();
cloned(m_clone);
m_clone = NULL;
}
}
void QSshSocket::m_releaseClone()
{
disconnect(m_clone,SIGNAL(connected()),this,SLOT(m_onCloneConnect()));
disconnect(m_clone,SIGNAL(loginSuccessful()),this,SLOT(m_onCloneLoggedIn()));
disconnect(m_clone,SIGNAL(workingDirectorySet(QString)),this,SLOT(m_onCloneCWDSet(QString)));
disconnect(m_clone,SIGNAL(error(QSshSocket::SshError)),this,SLOT(m_onCloneError(QSshSocket::SshError)));
}

void QSshSocket::m_onCloneConnect()
{
if (m_loggedIn)
m_clone->login(m_user,m_password);
else
{
m_releaseClone();
cloned(m_clone);
m_clone = NULL;
}
}

void QSshSocket::m_onCloneLoggedIn()
{
if (m_workingDirectory != ".")
m_clone->setWorkingDirectory(m_workingDirectory);
else
{
m_releaseClone();
cloned(m_clone);
m_clone = NULL;
}
}

void QSshSocket::m_onCloneCWDSet(QString cwd)
{
Q_UNUSED(cwd);
m_releaseClone();
cloned(m_clone);
m_clone = NULL;
}

void QSshSocket::m_onCloneError(QSshSocket::SshError)
{
m_releaseClone();
error(QSshSocket::CloneError);
m_clone = NULL;
}

void QSshSocket::disconnectFromHost()
{
m_host = "";
m_user = "";
m_password = "";
m_port = -1;
m_loggedIn = false;
m_clone = NULL;
if (m_session != NULL)
{
ssh_disconnect(m_session);
ssh_free(m_session);
}
m_session = NULL;
}

void QSshSocket::connectToHost(QString host, int port,LoggingProtocol logging)
{
m_host = host;
m_port = port;
m_loggingProtocol = logging;
}
void QSshSocket::login(QString user, QString password)
{
m_user = user;
m_password = password;
}
void QSshSocket::executeCommand(QString command)
{
m_currentOperation.type = Command;
if (m_workingDirectory != ".")
m_currentOperation.adminCommand = "cd " + m_workingDirectory + "; " + command;
else
m_currentOperation.adminCommand = command ;

m_currentOperation.command =command;
m_currentOperation.executed = false;
}

void QSshSocket::executeCommandResponse(QString command , QString response){
m_currentOperation.type = Command;
if (m_workingDirectory != ".")
m_currentOperation.adminCommand = "cd " + m_workingDirectory + "; " + command;
else
m_currentOperation.adminCommand = command ;

m_currentOperation.command =command;
m_currentOperation.executed = false;

}

void QSshSocket::pullFile(QString localPath, QString remotePath)
{
m_currentOperation.localPath = localPath;
if (QFileInfo(remotePath).isAbsolute())
m_currentOperation.remotePath = remotePath;
else
m_currentOperation.remotePath = m_workingDirectory + "/" + remotePath;
m_currentOperation.type = Pull;
m_currentOperation.executed = false;
}

void QSshSocket::pushFile(QString localPath, QString remotePath)
{
m_currentOperation.localPath = localPath;
if (QFileInfo(remotePath).isAbsolute())
m_currentOperation.remotePath = remotePath;
else
m_currentOperation.remotePath = m_workingDirectory + "/" + remotePath;
m_currentOperation.type = Push;
m_currentOperation.executed = false;
}

void QSshSocket::setWorkingDirectory(QString path)
{
m_nextWorkingDir = path;
m_currentOperation.type = WorkingDirectoryTest;
m_currentOperation.adminCommand = "[ -d " + m_nextWorkingDir +" ] && echo 'exists'";
m_currentOperation.executed = false;
}

bool QSshSocket::isConnected()
{
return m_session != NULL;
}

bool QSshSocket::isLoggedIn()
{
return m_loggedIn;
}

QString QSshSocket::user(){return m_user;}
QString QSshSocket::password(){return m_password;}
QString QSshSocket::host(){return m_host;}
int QSshSocket::port(){return m_port;}

void QSshSocket::m_attemptConnect()
{
m_session = ssh_new();

// set the pertinant ssh session options
ssh_options_set(m_session, SSH_OPTIONS_HOST, m_host.toLatin1().data());
ssh_options_set(m_session, SSH_OPTIONS_LOG_VERBOSITY, &m_loggingProtocol);
ssh_options_set(m_session, SSH_OPTIONS_PORT, &m_port);

// try to connect given host, user, port
int connectionResponse = ssh_connect(m_session);

// if connection is Successful keep track of connection info.
if (connectionResponse == SSH_OK)
{
m_connected = true;
connected();
}

else
error(SessionCreationError);
}

void QSshSocket::m_attemptLogin()
{

// try authenticating current user at remote host
int worked = ssh_userauth_password(m_session, m_user.toLatin1().data(), m_password.toLatin1().data());


// if successful, store user password.
if (worked == SSH_OK)
{
loginSuccessful();
m_loggedIn = true;
}
else
{
m_user = "";
m_password = "";
error(PasswordAuthenticationFailedError);
}


}

void QSshSocket::m_attemptCommand()
{
//if (m_loggingProtocol == LogAll || m_loggingProtocol == LogOperations)
//qDebug() << "!!! Command '" << m_currentOperation.command << "'' executing on "<< m_user << "@" << m_host <<" at working directory " << m_workingDirectory << " ... RESPONSE: "<< SSH_AGAIN;
// attempt to open ssh shell channel
ssh_channel channel = ssh_channel_new(m_session);

// if attempt fails,return
if (ssh_channel_open_session(channel) != SSH_OK)
{
error(ChannelCreationError);
return;
}


int requestResponse = SSH_AGAIN;

// attempt to execute shell command
while (requestResponse == SSH_AGAIN)
requestResponse = ssh_channel_request_exec(channel, m_currentOperation.adminCommand.toLatin1().data());

// if attempt not executed, close connection then return
if (requestResponse != SSH_OK)
{
error(ChannelCreationError);
return;
}


QByteArray buffer;
buffer.resize(1000);

// read in std out
int totalBytes = 0, newBytes = 0;
do
{
newBytes = ssh_channel_read(channel, &(buffer.data()[totalBytes]), buffer.size() - totalBytes, 0);
if (newBytes > 0)
totalBytes += newBytes;
}while ( newBytes > 0);


QString stdOut = QString(buffer).mid(0,totalBytes);

// read in std err
totalBytes = 0, newBytes = 0;
do
{
newBytes = ssh_channel_read(channel, &(buffer.data()[totalBytes]), buffer.size() - totalBytes, 1);
if (newBytes > 0)
totalBytes += newBytes;
}while ( newBytes > 0);

QString stdErr = QString(buffer).mid(0,totalBytes);

if (totalBytes >0)
{
//qDebug() << ssh_get_error(m_session);

}

// close channel
ssh_channel_send_eof(channel);
ssh_channel_close(channel);
ssh_channel_free(channel);

if (m_currentOperation.type == WorkingDirectoryTest)
{
if (stdOut.contains("exists"))
m_workingDirectory = m_nextWorkingDir;
m_nextWorkingDir = ".";
workingDirectorySet(m_workingDirectory);
}
else{
commandExecuted( m_currentOperation.command, stdOut,stdErr) ;
RESPUESTA_SSH=stdOut;
//qDebug() << " A RESPONDER: "<< stdOut;
}

}

void QSshSocket::m_attemptPull()
{
//if (m_loggingProtocol == LogAll || m_loggingProtocol == LogOperations)
//qDebug() << "!!! Remote file '"<< m_currentOperation.remotePath << "'' being pulled to local file '"<< m_currentOperation.localPath <<"'' ..." ;

ssh_scp scpSession = ssh_scp_new(m_session,SSH_SCP_READ, m_currentOperation.remotePath.toLatin1().data());
if (scpSession == NULL)
error(ScpChannelCreationError);

// attempt to initialize new scp session.
int scpInitialized = ssh_scp_init(scpSession);
if(scpInitialized != SSH_OK)
{
ssh_scp_close(scpSession);
ssh_scp_free(scpSession);
error(ScpChannelCreationError);
return;
}


// attempt to authorize new scp pull
if (ssh_scp_pull_request(scpSession) != SSH_SCP_REQUEST_NEWFILE)
{
ssh_scp_close(scpSession);
ssh_scp_free(scpSession);
error(ScpPullRequestError);
return;
}

// accept authorization
ssh_scp_accept_request(scpSession);


// get remote file size
int size = ssh_scp_request_get_size(scpSession);

// resize buffer, read remote file into buffer
QByteArray buffer;
buffer.resize(size);

// if an error happens while reading, close the scp session and return
if (ssh_scp_read(scpSession, buffer.data() , size) == SSH_ERROR)
{
ssh_scp_close(scpSession);
ssh_scp_free(scpSession);
error(ScpReadError);
return;
}

// loop until eof flag
if (ssh_scp_pull_request(scpSession) != SSH_SCP_REQUEST_EOF)
{
ssh_scp_close(scpSession);
ssh_scp_free(scpSession);
error(ScpReadError);
return;
}

//close scp session
ssh_scp_close(scpSession);
ssh_scp_free(scpSession);

// open up local file and write contents of buffer to it.
QFile file(m_currentOperation.localPath);
file.open(QIODevice::WriteOnly);
file.write(buffer);
file.close();

pullSuccessful(m_currentOperation.localPath,m_currentOperation.remotePath);
}

void QSshSocket::m_attemptPush()
{
//if (m_loggingProtocol == LogAll || m_loggingProtocol == LogOperations)
//qDebug() << "!!! Local file '" << m_currentOperation.localPath <<"'' being pushed to remote file '"<< m_currentOperation.remotePath << "'' ..." ;

// attempt to create new scp from ssh session.
ssh_scp scpSession = ssh_scp_new(m_session,SSH_SCP_WRITE, m_currentOperation.remotePath.toLatin1().data());

// if creation failed, return
if (scpSession == NULL)
error(SocketError);


// attempt to initialize new scp session.
int scpInitialized = ssh_scp_init(scpSession);


// if failed, close scp session and return.
if(scpInitialized != SSH_OK)
{
ssh_scp_close(scpSession);
ssh_scp_free(scpSession);
error(ScpChannelCreationError);
return;
}


// open the local file and check to make sure it exists
// if not, close scp session and return.
QFile file(m_currentOperation.localPath);
if (!file.exists())
{
ssh_scp_close(scpSession);
ssh_scp_free(scpSession);
error(ScpFileNotCreatedError);
return;
}

// if the file does exist, read all contents as bytes
file.open(QIODevice::ReadOnly);
QByteArray buffer =file.readAll();
file.close();

// attempt to authorize pushing bytes over scp socket
// if this fails, close scp session and return.
if (ssh_scp_push_file(scpSession, m_currentOperation.remotePath.toLatin1().data(), buffer.size(), S_IRUSR | S_IWUSR) != SSH_OK)
{
ssh_scp_close(scpSession);
ssh_scp_free(scpSession);
error(ScpPushRequestError);
return;
}


// once authorized to push bytes over scp socket, start writing
// if an error is returned, close scp session and return.
if ( ssh_scp_write(scpSession,buffer.data(), buffer.size()) != SSH_OK)
{

ssh_scp_close(scpSession);
ssh_scp_free(scpSession);
error(ScpWriteError);
return;
}


// close scp session and return.
ssh_scp_close(scpSession);
ssh_scp_free(scpSession);

pushSuccessful(m_currentOperation.localPath,m_currentOperation.remotePath);
}