Method open

Src/SSH/ChannelSSH.cpp:60–221

}

bool CChannelSSH::open(OpenMode mode)
{
    int nRet = 0;
    QString szErr;
    
    if(!m_pParameter) {
        qCritical(log) << "The parameter is null";
    }
    Q_ASSERT(m_pParameter);
    
    bool bRet = QIODevice::open(mode);
    if(!bRet)
        return bRet;
    
    m_Session = ssh_new();
    if(NULL == m_Session)
    {
        szErr = tr("SSH failed: ssh_new.");
        qCritical(log) << szErr;
        setErrorString(szErr);
        return false;
    }
    
    do{
        struct ssh_callbacks_struct cb;
        memset(&cb, 0, sizeof(struct ssh_callbacks_struct));
        cb.userdata = this;
        cb.log_function = cb_log;
        ssh_callbacks_init(&cb);
        ssh_set_callbacks(m_Session, &cb);
        ssh_set_log_level(SSH_LOG_TRACE);

        /*
        int value = 1;
        ssh_options_set(m_Session, SSH_OPTIONS_NODELAY, (const void*)&value);//*/
        
        /*
            See: [ssh_options_set()](https://api.libssh.org/stable/group__libssh__session.html#ga7a801b85800baa3f4e16f5b47db0a73d)
            SSH_LOG_NOLOG: No logging
            SSH_LOG_WARNING: Only warnings
            SSH_LOG_PROTOCOL: High level protocol information
            SSH_LOG_PACKET: Lower level protocol information, packet level
            SSH_LOG_FUNCTIONS: Every function path The default is SSH_LOG_NOLOG.
         */
        int verbosity = SSH_LOG_NOLOG;
        ssh_options_set(m_Session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity);
        
        auto &net = m_pParameter->m_Net;
        if(net.GetHost().isEmpty()) {
            szErr = tr("SSH failed: the server is empty");
            qCritical(log) << szErr;
            setErrorString(szErr);
            break;
        } else {
            nRet = ssh_options_set(m_Session, SSH_OPTIONS_HOST,
                                   net.GetHost().toStdString().c_str());
            if(nRet) {
                szErr = tr("SSH failed: Set host fail. host:")