I'm seeking knowledge to guide me through this dense mist...

I discovered the telnet server on which I connect (Windows Server (probably 2013)), any command sent must have at maximum 1024 characters, anything more than this, the server asks me for "More? ", and then I should input the remaining characters and press enter. So far, so good.

I have a program written in Perl, that executes a series of commands in this server, but recently some commands have been stuck until it times out, and I discovered that are the commands with more than 1024 characters.

So, I decided to rewrite the execution function to support this behavior, but any one of methods tried didn't worked.

This is how I normally execute my commands before: 

   my $t = new Net::Telnet(Telnetmode => 1, Errmode => 'return');
   $t->prompt('/C:\\\\(.*)>/i');
   $t->open(Host => '192.168.0.10');

   $ok = $t->login('myUsername', 'myPassword');

   my $cmd = "blah blah blah (...)"; # 1287 characters of a VALID comm
+and
   my @r = $t->cmd(String => $cmd, Timeout => 60);

[download]

This will result in timeout. If the command have at maximum of 1024 characters, it passes normally.

Then I decided use this way, instead of  $t->cmd() 

   my @r = $t->print(String => $cmd, Timeout => 60);
   ($prematch, $match) = $t->waitfor(String => 'More? ', Timeout=>60) 
+or die("MORE NOT FOUND");

[download]

And the waitfor times out... I'm pretty lost here.

So my questions are:

1) Am I missing anything about telnet and the limitation of 1024 input characters? So maybe this could be solved by using a different configuration? I have googled a lot about this subject and found't anything useful...

2) Is the commands $t->print() and $t->waitfor() right?

Where do we go from here?

Thanks for your help monks!

In reply to Telnet command with more than 1024 chars by ElectricCheese

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