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//  Important: It is helpful to send the contents of the
//  ssh.LastErrorText property when requesting support.

Chilkat.Ssh ssh = new Chilkat.Ssh();

//  Any string automatically begins a fully-functional 30-day trial.
bool success;
success = ssh.UnlockComponent("30-day trial");
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Connect to an SSH server:
string hostname;
int port;

//  Hostname may be an IP address or hostname:
hostname = "www.some-ssh-server.com";
port = 22;

success = ssh.Connect(hostname,port);
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Wait a max of 5 seconds when reading responses..
ssh.IdleTimeoutMs = 5000;

//  Authenticate using login/password:
success = ssh.AuthenticatePw("myLogin","myPassword");
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Open a session channel.  (It is possible to have multiple
//  session channels open simultaneously.)
int channelNum;
channelNum = ssh.OpenSessionChannel();
if (channelNum < 0) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Some SSH servers require a pseudo-terminal
//  If so, include the call to SendReqPty.  If not, then
//  comment out the call to SendReqPty.
//  Note: The 2nd argument of SendReqPty is the terminal type,
//  which should be something like "xterm", "vt100", "dumb", etc.
//  A "dumb" terminal is one that cannot process escape sequences.
//  Smart terminals, such as "xterm", "vt100", etc. process
//  escape sequences.  If you select a type of smart terminal,
//  your application will receive these escape sequences
//  included in the command's output.  Use "dumb" if you do not
//  want to receive escape sequences.  (Assuming your SSH
//  server recognizes "dumb" as a standard dumb terminal.)
string termType;
termType = "dumb";
int widthInChars;
widthInChars = 120;
int heightInChars;
heightInChars = 40;
//  Use 0 for pixWidth and pixHeight when the dimensions
//  are set in number-of-chars.
int pixWidth;
pixWidth = 0;
int pixHeight;
pixHeight = 0;
success = ssh.SendReqPty(channelNum,termType,widthInChars,heightInChars,pixWidth,pixHeight);
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Start a shell on the channel:
success = ssh.SendReqShell(channelNum);
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Start a command in the remote shell.  This example
//  will send a "dir" command to retrieve the directory listing.
success = ssh.ChannelSendString(channelNum,"dir" + "\r\n","ansi");
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Send an EOF.  This tells the server that no more data will
//  be sent on this channel.  The channel remains open, and
//  the SSH client may still receive output on this channel.
success = ssh.ChannelSendEof(channelNum);
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Read whatever output may already be available on the
//  SSH connection.  ChannelReadAndPoll returns the number of bytes
//  that are available in the channel's internal buffer that
//  are ready to be "picked up" by calling GetReceivedText
//  or GetReceivedData.
//  A return value of -1 indicates failure.
//  A return value of -2 indicates a failure via timeout.

//  The ChannelReadAndPoll method waits
//  for data to arrive on the connection usingi the IdleTimeoutMs
//  property setting.  Once the first data arrives, it continues
//  reading but instead uses the pollTimeoutMs passed in the 2nd argument:
//  A return value of -2 indicates a timeout where no data is received.
int n;
int pollTimeoutMs;
pollTimeoutMs = 2000;
n = ssh.ChannelReadAndPoll(channelNum,pollTimeoutMs);
if (n < 0) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Close the channel:
success = ssh.ChannelSendClose(channelNum);
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Perhaps we did not receive all of the commands output.
//  To make sure,  call ChannelReceiveToClose to accumulate any remaining
//  output until the server's corresponding "channel close" is received.
success = ssh.ChannelReceiveToClose(channelNum);
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Let's pickup the accumulated output of the command:
string cmdOutput;
cmdOutput = ssh.GetReceivedText(channelNum,"ansi");
if (cmdOutput == null ) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Display the remote shell's command output:
textBox1.Text += cmdOutput + "\r\n";

//  Disconnect
ssh.Disconnect();