Pascal (Lazarus/Delphi)

SSH Commands to Cisco Switch

See more SSH Examples

Demonstrates how to establish an SSH session with a Cisco switch (or something similar) and send commands in a device console session. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Ssh;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  ssh: TSsh;
  channelNum: Integer;

begin
  success := False;

  //  This example assumes the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  ssh := TSsh.Create;

  success := ssh.Connect('172.16.16.100',22);
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;

  //  Authenticate using login/password:
  success := ssh.AuthenticatePw('myLogin','myPassword');
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;

  //  Start a shell session.
  channelNum := ssh.QuickShell();
  if (channelNum < 0) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;

  //  If the CISCO switch returns a prompt with "#", then read until we get the prompt.
  //  (It's not actually required that we do this, but it helps to know that all is OK at this point..)
  success := ssh.ChannelReceiveUntilMatch(channelNum,'#','utf-8',True);
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;

  //  Show what we received so far:
  WriteLn(ssh.GetReceivedText(channelNum,'utf-8'));

  //  Send a "show clock" command.
  success := ssh.ChannelSendString(channelNum,'show clock' + #10,'utf-8');

  //  Read the output to the next interactive prompt.
  success := ssh.ChannelReceiveUntilMatch(channelNum,'#','utf-8',True);
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;
  WriteLn(ssh.GetReceivedText(channelNum,'utf-8'));

  //  Send another command and get the output, and so on...
  success := ssh.ChannelSendString(channelNum,'some other command' + #10,'utf-8');
  success := ssh.ChannelReceiveUntilMatch(channelNum,'#','utf-8',True);
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;
  WriteLn(ssh.GetReceivedText(channelNum,'utf-8'));

  ssh.Disconnect();


  ssh.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.